Clash of the Titans!

Except that the Titans weren't in it. It was Greek Gods (and heroes) and not Titans, see.

When I was a kid I was given a book written by Roger Lancelyn Green, "Tales of the Greek Heroes" (still in print). It was full of stories about Hercules, Jason and The Argonaughts, Theseus and the Minotaur. Clash of the Titans is about Perseus, Andromeda, the Kraken and the Gorgon, Medusa:



It's a pretty good pizza movie, although the acting isn't brilliant, but, although it's not as much fun as Ray Harryhausen's work, it is true to the spirit of the greek legends. No fighting skeletons, though: