The best way to tame a titano is to use a cannon mounted on a quetzal platform saddle. This is necessary because the cannon needs to move with the titano. Different ammunition can be used to KO it, but this is not recommended as cannons are much more effective.
You hit it with cannons on a quetzal. Go for it’s head. It’s torpor won’t drain either so take your time. They can’t eat just stuff a platform saddle on the titan once KO’ed. You use daedons to heal it when it’s food level is low.
If you try taming these guys, tame a Quetzal first and equip it with a platform saddle. Then, put 2 storage boxes on it and a cannon. Make sure you make LOTS of cannon balls. Then, shoot the titan in the head.