No, it only managed to break my trade depot before it walked straight into a cage trap. But how do I tame the thing? It doesn't show up in the list at the kennels. And yes, the dungeon master is here.
Hmm I took a quick look at the creature script and Colossus and Titans aren't tameable (no Pet Exotic lines). If you wanted to you could add the line in but it would be technically cheating :/
That's kind of disappointing since the Colossus might be the most dangerous megabeast in the game, being able to heal it's wounds almost instantly and kill things relatively easily.
Dragons and Hydras are tamable however.
Also if it does go on a rampage, have some macedwarves and axedwarves ready to kill it. It's limbs sever when mangled, but it doesn't suffer any kind of internal damage (making pierce weapons like crossbows useless), so blunt weapons are the best choice, cutting weapons second best
Edit: Oh loving hell, why in the world did I buy that coal. I really hope no one catches on fire near this thing