How did Poseidon become a god?

Answer 1

Poseidon's parents were Kronos and Rheia, who were first-generation Titans. The first Titans were themselves born of the earth and the sky.

All of Kronos' and Rheia's children were born as gods or goddesses so Poseidon didn't actually become a god, he was born as one.

Answer 2

Oh, what a lovely question! Poseidon became a god in Greek mythology because he was one of the children of the Titans, Rhea and Cronus. When the Titans were overthrown by the Olympian gods, Poseidon and his siblings, including Zeus and Hades, became the ruling deities of the Greek pantheon. Just like a beautiful painting coming to life, Poseidon's story is a part of the intricate and fascinating tapestry of Greek mythology.