These guys can be used for soaking up turrets and plants, but remember they destroy metal so why not let your regular Dino's tank most of the damage than use this beast to destroy all the metal structures. They aren't as tanky as they seem.
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.