Titans according to Greek Mythology were six elder gods named: Cronus, Coeus, Crius, Iapetus, Hyperion and Oceanus, who ruled the cosmos before the Olympian gods came to power. Cronus, The King of the Titanes, led his brothers in the castration of Uranus, and was himself deposed by his son Zeus.
The name Titans is also given to those semi-divine beings who were descended from the Titans, such as Prometheus and Helios. Prometheus was the wisest Titan. His name means "forethought" and he was able to foretell the future. Atlas was the son of Iapetus. Unlike his brothers Prometheus and Epimetheus, Atlas fought with the other Titans supporting Cronus against Zeus. Due to Cronus's advanced age, Atlas lead the Titans in battle. As a result, he was singled out by Zeus for a special punishment and made to hold up the sky on his shoulders. The Titans
The Pelasgian tribes of Thrace were said to have been born from the blood of Titans.
The sisters of the Titans, Rhea, Theia, Mnemosyne, Themis and Tethys, were known as "Titanides".
- Dictionary of Greek and Roman Biography and Mythology.