In Greek Myhology the Titans were a race of God Giants resulting from the union of the Sky God Uranus and the Earth Mother Gaia. They ruled the world at the beginning of creation. They were the personifications of Nature.

There were 12 children in all, each son either had children by, or married, one of his sisters. They were Cronus and Rhea, Oceanus and Tethys, Coeus and Phoebe, Crius and Mnemosyne, Hyperion and Theia and Iapetus and Themis.
Cronus was the foremost Titan, who overthrew his father Uranus. He remained King of the Gods until he in turn was overthrown by his own son Zeus in the war of the Titans. The defeated Titans were confined to the Tartarus a prison in the Underworld, bound in chains and buried as deep beneath the Earth's surface as the sky is above it.
The Romans identified Cronus with Saturn, their God of Agriculture. The Roman's Saturnalia Festival to honour Saturn was held near the end of December and consisted of a joyful public feast and exchange of gifts. This festival was kept in the Christian era and renamed Christmas.
Today the Titans are seen as representations of the forces of the natural world, wild and untameable but capable of great beauty.