Does not spawn in the wild.Player can learn Titan Rex Artificial Egg and Titan Rex Saddle at level 97.
Drag weight:950.It can be modified via INI.
Prevent Mating.It can be modified via INI.
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-Rage Value: When being attacked,its rage value will increase.The damage dealt by its bite attack and ultra roar attack gradually rises to 1.5 times/2 times the original damage as the rage value fills.

-Boss Trophy Enhancement: After using the C key to roar,Titan Rex will absorb Alpha Boss trophies from its inventory to gain additional enhancement.Once all applicable trophies are absorbed,Titan Rex's appearance will change.Each Boss trophy provides a 20% increase in additional damage and 10 points of natural armor.
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-Broodmother Lysrix:When being attacked by melee damage,apply Shadowmane Thornmail Poisoned Buff to the damage causer,with a maximum of 3 stacks.
-Megapithecus: Bite can damage stone structures.Ultra roar will instantly kill creatures with less than 20% of their max health.
-Dragon: Bleed debuff from ultra roar is changed to dragon enflamed debuff.
-Manticore: Provide a 10% damage reduction.
-Crystal Wyvern Queen: Upon contact with water,Hydrated buff will be added.
-Dinopithecus King: Gain an additional 10000 health value.
-Fenrisúlfr: Unconditionally recover 50 health per second.
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Left-click: Bite. If a creature is currently being grabbed,Titan Rex will execute it and gain Argentavis Rapid Regeneration buff.
Left-click (Hold): Grab. Allow to grab a creature with a weight of 250 or less.
Left-click (Hold,Charging Stance): Heavy Tail Whip. Inflicts a knockback effect, has 50% armor penetration, and applies the Carnotaurus Bleed debuff. Requires 50% or more Rage. Ends the Charging Stance upon use. After using Heavy Tail Whip, Titan Rex roars and gains the Rage buff, which provides 1.25x damage and immunity to percentage health drain debuffs.

Right-click: Stomp.
Right-click (Hold): Heavy Stomp. Subsequently enters/cancels the Charging Stance.
Right-click (Hold,Charging Stance): Ultra Roar. Inflicts a knockback effect, has 50% armor penetration, and applies the Carnotaurus Bleed debuff. Requires 50% or more Rage. Ends the Charging Stance and depletes all Rage upon use.

C Key: Roar, while absorbing Hard Boss trophies from the inventory.

X Key: Switch If Turn In Place.