Bola and club does the trick for an easy tame. Great starter tame.

Try to hit the coropted glowing things around his body. Ice you have destroyed all, it should fall down on the ground knocked out. You do not need any taming food for it, Just go up to it and click tame to tame it. No need to build a saddle because it already comes with one.

You can use the wyverns that spawn in with it to kill this Titan

Just shoot it’s shoulder if the corruption disappears, it’s behind his/her head