With all Titans, the battle takes place in the overworld and not in an arena. This means you are not restricted on tame limit or tame weight (or other restrictions). Use this to align your dino army prior to the fight and surround the titan. Do remember, the titan has a breath attack that applies a freeze CC, stunning dinos and dismounting the rider - do not attack in melee or suffer a blow dealing tons of damage.
I recommend bred Gigas; wild caught will not be durable enough. Apply standard boss rules like Yuty buffs, Daedon healing and good saddles for better damage and survivability. Structures do not work as it can damage even Tek, but you could take sniping position, safe from aggro, or ride the yutys and buff the Gigas yourself.
Velonosaurs do fixed damage in turret mode, only doing fully damage when ridden, not recommended due to freeze.
Could apply proportional damage effects like Fire (wyvern) or bleed (Carno, Thylo, Allo).
Watch for rival players in PVP.
This also applies to forest titan and King titan, desert titan flies so no Gigas :c
Okay, so with the release of gen 2 came the tek canteens, switch those to hot, and when you drink one it gives you 10 seconds of frost immunity and other good buffs, which can prove invaluable in this fight weather it be taming it or battling it
Get yourelves a army of velonasaurus and get armies of them on right and left side of the titan,put all of them on turret mode and a Yutyrannus behind the armies and put it on courage mode and they'll do enormous damage to the ice titan
Has to be summoned from a terminal in the snow cave. Entrance is just outside the northwestern part of the snow dome, near a river. Be prepared for a fight, as the cave is chock full of bears, yet is, and other high level dangers
A good way to start this fight is by luring a wild giga to the spawn zone. The wild giga will do some insane damage to the Titan. Once the wild giga is dead, finish it off with gigas, wyverns, reapers, rexs and/or something else. I did this strat and I beat it in 10 minutes