For taming this creature you hav wit destroy the corruption spots. What I highly recommend is to get lots of diplodocusses and level up nothing but health and put a saddle on each one. Let them attack the ice titan so they’re distracting it but not dealing any damage. While he’s distracted destroy the corruption spots and there you go. The thing with titans is any health you do will be transferred to the tamed one. For example if you take the ice Titan and deal 150,000 damage in the process the take will have 200,000 health(because the titan has 350k health).