Gaea grieved greatly for the Cyclopes and the Hecatocheiroi and desired to free them from the underworld. She called upon the Titans for one of them brave enough to overthrow their father and free their brothers from the underworld, but they all refused from fear of him and his power. From among them, Cronus promised to carry out her wishes and took a scythe to slay Ouranus. Cronus overthrew his father's rule of the gods by fatally wounding him. The dying Ouranus prophesized that Cronus would likewise be overthrown by one of his own children. Cronus also slew the Titan Ophion for control of Mount Olympus to establish his seat of power and took the Titaness Rhea as his wife.

As a result of Ouranus' dying prophesy, upon the birth of his own children, Cronus had the infant imprisoned in Tartarus. The offspring he sent there were Hades, Hestia, Demeter and Hera. (Later legends erroneously claimed that Cronus had actually swallowed his children and that they remained alive inside him until released by their brother Zeus.) Instructed by Gaea, Rhea concealed her sixth pregnancy from Cronus and secretly gave birth to Zeus on Mount Lycaeum in Arcadia, an area of land now known as Greece. Rhea gave the infant Zeus to the safekeeping of Gaea, who hid the baby in the cave of Dicte on Aegean Hill on the isle of Crete, where he was tended by various minor goddesses.

While Cronus ruled as king of the gods, he achieved a period of paradise upon earth without war or death and was eventually worshipped as god of time, having outgrown his worship as an earth-god. As Zeus matured, he gathered a retinue of allies from his siblings, the Cyclops and the Hecatocheiroi as well as a few Titans disenchanted by Cronus. Zeus fought to conquer Olympus in a ten year war which ended with Zeus's victory. He imprisoned most of the male Titans in Tartarus and established himself as ruler of the gods, sharing his dominance of Earth with Poseidon and Hades, who took dominance over the seas and the underworld, respectively.

Over the years, Theia, one of the female Titans imprisoned in Tartarus, managed to free herself and escaped to Earth, living as a mortal and developing her power over several years. her husband, Hyperion, somehow sensing she was missing subsequently managed to free himself with the aide of Wonder Girl of the Teen Titans. The Titans tried to retake Olympus, but were unsuccessful. Upon realizing how many years had passed, they developed a truce with Zeus and the Olympian gods. They established a new home elsewhere in the universe and rallied with the Olympians when Theia tried to claim Olympus on her behalf.

The Titans retreated to another world in the Earth's dimension which they called New Chronos. Possibly taking inspiration from the Young Gods gathered by Gaea, they began seeking children of pure genetic potential to serve as their heirs after the Olympians. According to Rhea, they began this undertaking after Zeus had exiled from Earth, but this may be a symptom of concurrent alterations in the time stream after the Crisis of Infinite Earths. The Titans chose children from Earth and nearby planets, granting them names from the cities of Ancient Greece. Their intent was to return these children to their home planets with their memories altered in order that they would serve as exemplars for their home planets. One of these children was allegedly Donna Troy (Wonder Girl). When Sparta of Synriannaq regained her memories, she launched a war against the others and came to Earth to slay Wonder Girl, who united with the two surviving exemplars and defeated Sparta, placing her in the custody of Xanthi, another of the exemplars.

The Titans ceased collecting potential heirs after Sparta's madness. They returned to Earth when Wonder Girl was confronted by Lord Chaos, an alternate future version of her son who had traveled back in time to secure his power in the future. To keep him from gaining power, Wonder Girl asked to be stripped of her godly powers. She eventually became known as Troia, but when she was murdered by a rogue Superman robot, Hyperion restored her to life and imbued her with memories that were not her own from Phoebe, the goddess of the moon. With Troia believed dead, Hyperion took her from Earth, sending her as his champion to end war on other planets, but Donna regained her true memories when the Teen Titans realized she was still alive. Hyperion had discovered a way to recreate the Crisis and recreate the universe under his guidance, but Donna instead tried to re-imprison him in Tartarus. Once Hyperion realized her motives, he clashed with the Teen Titans, leading to the destruction of New Chronus.

The remaining Titans returned to Tartarus afterward, but Cronus escaped a few more times. He attempted to overthrow the pantheons of Earth in order to lay claim to Earth, but was defeated by Wonder Woman and the Hindu Gods. On his second escape attempt, he clashed with Hercules and the Hulk and was once again forced back to Tartarus.

The Titans possess the conventional physical attributes of the Olympian gods. Like all Olympians, they are immortal: they have has not aged since reaching adulthood and cannot die by any conventional means. They are immune to all Earthly diseases and are resistant to conventional injury. If any of then were somehow wounded, their godly life force would enable them to recover with superhuman speed. It would take an injury of such magnitude that it dispersed a major portion of their bodily molecules to cause a physical death. Even then, it might be possible for a god of significant power, such as Zeus, Poseidon and Apollo or for a number of Olympian gods of equal power working together to revive them. The Titans also possess superhuman strength and their Olympian metabolism provide them with far greater than human endurance in all physical activities. (Olympian flesh and bone is about three times as dense as similar human tissue, contributing to the Olympians' superhuman strength and weight.) Each of the Titans also possess mystical powers over a particular field or object connected to their individual personalities or traits.

First Appearance: New Teen Titans I #11

Real Name: Coeus
Occupation: God of the moon
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Coeus except as a figure from mythology.
Other Aliases: Koeus
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Phoebe (sister/wife), Asteria, Leto (daughters), Zeus, Perses (sons-in-law), Apollo (grandson), Artemis, Hecate (grand-daughters),
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Coeus is one of the Titans who rose up against Zeus. Defeated by the Olympians, he was exiled to Tartarus afterward, freed in recent years by Hyperion. 
Height: 6' 4"
Weight: 425 lbs.
Eyes: Blue
Hair: Black
Strength Level: Coeus can lift (press) around 45 tons.
Known Superhuman Powers: Coeus has mystical powers to attract and repel other objects as well as to erect shields and beams of force.

Real Name: Crius
Occupation: God of prosperity
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Crius except as a figure from mythology.
Other Aliases: Krius
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Eurybia (wife), Astraeus, Pallas, Perses (sons), Hecate (grand-daughter), Boreas, Notus, Eurus, Zephyros (grandsons),
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Crius was one of the Titans who sided with Cronus against Zeus. He married his half-sister, Eurybia, the sister of Nereus. He was imprisoned in Tartarus after being overthrown by Zeus.
Height: 6' 5"
Weight: 410 lbs.
Eyes: Blue
Hair: Black
Strength Level: Crius can lift (press) about 45 tons.
Known Superhuman Powers: Crius has the ability to mystical conjure other objects and to teleport himself and others at will.

Cronus has his own entry.

Dione has her own entry.

Real Name: Hyperion
Occupation: God of the sun
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Hyperion except as a figure from mythology.
Other Aliases: None known
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Theia (wife), Helios (son), Eos, Selene (daughters), Circe (grand-daughter), Aeetes (grandson, deceased), 
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Hyperion was one of the Titans imprisoned in Tartarus after Zeus claimed Olympus. He became leader of the Titans afterward following Cronus departing the group.
Height: 6' 3"
Weight: 425 lbs.
Eyes: Blue
Hair: Blonde
Strength Level: Hyperion can lift (press) about 50 tons.
Known Superhuman Powers: Hyperion can emanate sunlight as heat or as illumination.

Real Name: Iapetus
Occupation: God of forethought
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Japet except as a figure from mythology.
Other Aliases: Japeth
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Clymene (wife), Prometheus, Eprimetheus, Atlas, Menoetius (sons), Hermes (great-grandson), Odysseus (descendant, deceased)
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Japet was one of the Titans. He took goddess Clymene, one of the Oceanides, as his wife and she sired him Atlas, Prometheus, Eprimetheus and Menoetius. Only Atlas and Menoetius sided with him against Zeus. 
Height: 6' 4"
Weight: 450 lbs.
Eyes: Blue
Hair: Black
Strength Level: Japet can lift (press) about 50 tons.
Known Superhuman Powers: Japet has extra0ordinary clairvoyant powers, enabling him to perceive events with his mind greater than most of the gods.

Real Name: Mnemosyne
Occupation: Goddess of memory
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Mnemosyne except as a figure from mythology.
Other Aliases: None known
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Zeus (husband), The Muses (daughters)
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Mnemosyne was one of the few Titans to support Zeus in overthrowing Cronus, later becoming his wife and mother of the Muses.
Height: 5' 9"
Weight: 350 lbs.
Eyes: Blue
Hair: Blonde
Strength Level: Mnemosyne can lift (press) around 25 tons.
Known Superhuman Powers: Mnemosyne has great powers in the strength of her voice, enabling her to create sonic effects to shatter glass or to hypnotize other beings with a word.

Real Name: Nereus
Occupation: God of the sea
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Nereus except as a figure from mythology.
Other Aliases: Old Man of the Sea, "Davy Jones"
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Pontus (father), Gaea (mother), Phorcys, Thaumes (brothers), Ceto, Eurybia (sisters), Doris (wife), Amphitrite, Thetis and the Nereids (daughters), Poseidon (son-in-law), Medusa and the Gorgons (nieces), Triton (grandson), Achilles (grandson, deceased)
Group Affiliation: The Gods of Olympus
Base of Operations: Mobile
History: Nereus was one of the few Titans to support Zeus in his overthrow of the Titans. He taught Zeus in the use of his shape-shifting powers and relinquished his daughter, Amphitrite, to Poseidon as his successor. Hercules wrestled Nereus for the location of the Garden of the Hesperides. In modern folklore, he has been dubbed "Davy Jones" as the spirit of the sea.
Height: 6' 2"
Weight: 475 lbs.
Eyes: Green
Hair: White (Blonde in his youth)
Strength Level: Nereus can lift (press) 25 tons; in his youth, his strength was significantly greater, possibly in the Class 100 level.
Known Superhuman Powers: Nereus could control and manipulate the forces of the sea. He was also an extra-ordinary shape shifter and could change his appearance at will.

Real Name: Oceanus
Occupation: God of the sea
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Oceanus except as a figure from mythology.
Other Aliases: None known
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Achelous, Asopus, Inachos and the River-Gods (sons), Metis, Calypso, Pleione, Styx and the Oceanides (daughters), Athena (grand-daughter)
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Oceanus was one of the few Titans to support Zeus against Cronus, accepting a position of minor importance after the Titans were overthrown. He and Tethys were parents of many of the river-gods and ocean-divinities of earth.
Height: 7' 2"
Weight: 510 lbs.
Eyes: Brown
Hair: Brown
Strength Level: Oceanus can lift (press) about 65 tons.
Known Superhuman Powers: Oceanus has powers over the ocean and marine life.

Real Name: Ophion
Occupation: God of fertility
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Ophion except as a figure from mythology.
Other Aliases: None known
Place of Birth: Olympus
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Eurynome (wife), Aether (alleged son), Hemera (alleged daughter), Erebus (alleged grandson), Nyx (alleged grand-daughter), Charon, Hypnos, Morpheus, Keres (alleged great-grandsons), Nemesis (alleged grand-daughter),
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Ophion was Ruler of Olympus before Zeus was born. He took Eurynome, daughter of Oceanus, as his wife, but he was slain by Cronus laying siege to Olympus. Eurynome sided with Zeus against Cronus, becoming his wife and mother of the Graces.
Height: 6' 9"
Weight: 525 lbs.
Eyes: Blue
Hair: Blonde
Strength Level: Ophion can lift (press) 65 tons.
Known Superhuman Powers: Ophion has powers over sky, rain and weather.

Real Name: Phoebe
Occupation: Goddess of the moon
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Phoebe except as a figure from mythology.
Other Aliases: None known
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Coeus (husband), Asteria, Leto (daughters), Apollo (grandson), Artemis, Hecate (grand-daughters),
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Phoebe is the wife of Coeus, god of the moon. She stood by his side against Zeus and the Olympians.
Height: 5' 9"
Weight: 335 lbs.
Eyes: Blue
Hair: Black
Strength Level: Phoebe can lift (press) about 25 tons.
Known Superhuman Powers: Phoebe possesses mystical powers to fly, conjure a silvery light force and to attract and repel other objects.

Real Name: Rhea
Occupation: Goddess of Earth
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Rhea except as a figure from mythology.
Other Aliases: Ops (Roman name), Cybele (Phrygian name),
Place of Birth: Unrevealed
Marital Status: Separated
Known Relatives: Ouranus (father), Gaea (mother), Cronus (husband), Zeus, Poseidon, Hades (sons), Hera, Demeter, Hestia (daughters), Chiron (step-son), Plute (step-daughter),
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Rhea is the wife of Cronus. She hid the birth of her son Zeus from Cronus and sided with him to overthrow his father from Olympus. After the Olympians defeated the Titans, she retired from her godly duties in favor of her daughters. She has lived on Olympus well into modern times.
Height: 5' 11"
Weight: 345 lbs.
Eyes: Blue
Hair: Red
Strength Level: Rhea can lift (press) about 25 tons.
Known Superhuman Powers: Rhea possesses the ability to control plants.

Real Name: Tethys
Occupation: Goddess of the sea
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Tethys except as a figure from mythology.
Other Aliases: None known
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Achelous, Asopus, Inachos and the River-Gods (sons), Metis, Calypso, Pleione, Styx and the Oceanides (daughters), Athena, Maia (grand-daughters), Hermes (great-grandson),
Group Affiliation: The Gods of Olympus
Base of Operations: Olympus
History: Tethys was one of the few Titans to side with Zeus against Cronus. She was nurse and foster mother for Rhea's daughters. She and Oceanus stepped aside in favor of Poseidon when he became king of the seas.
Height: 5' 7"
Weight: 325 lbs.
Eyes: Blue
Hair: Blonde
Strength Level: Tethys can lift (press) 25 tons.
Known Superhuman Powers: Rhea possesses powers over the ocean and can communicate with all forms of sea-life.

Theia has her own bio.

Real Name: Themis
Occupation: Goddess of oracles and prophecy
Legal Status: Citizen of Olympus
Identity: The general populace of Earth is unaware of Themis except as a figure from mythology.
Other Aliases: Carmenta (Roman name)
Place of Birth: Unrevealed
Marital Status: Married
Known Relatives: Ouranus (father), Gaea (mother), Zeus (husband), The Moirae, The Horae (daughters)
Group Affiliation: The Gods of Olympus
Base of Operations:
History: Themis was one of the few Titans to support Zeus against Cronus. She later married Zeus and gave birth to the Moirae (Fates) and the Horae. She served as an advisor to Zeus, warning him not to seduce Thetis and not to arbitrate the Golden Apple between Hera, Athena and Aphrodite, instead relinquishing it to Paris. She left her oracle at Delphi to Apollo and dispensed premonitions to Prometheus.
Height: 5' 11"
Weight: 345 lbs.
Eyes: Brown
Hair: Brown
Strength Level: Themis can lift (press) about 25 tons.
Known Superhuman Powers: Themis possesses greater abilities to foretell the future than the majority of the Olympian gods.

Themis