The phrase "titanic battle" refers to a very big and intense fight or struggle between two powerful opponents, similar to the legendary battle involving the ship Titanic. Full definition
You've got a story with booze, heavy conversations and titanic battles between monsters and robots, all somehow coming together in one decidedly original mix. (screenanarchy.com)
He still thinks he can prevail in one more titanic battle against the odds. (independent.co.uk)
Monster Hunter has always been best played in a group, upping the challenge to allow for titanic battles while players swap tips and secrets. (ign.com)