I'm sure the Titan is a tough truck but I think you were just lucky his vehicle was lower than your rear bumper.

I had a Ford F150 4x4 and got rear ended by a F150 2x4. My truck looked a lot like your's minus the bumper damage. The front of his truck looked a lot like the car that hit you. Hood folded up, headlights and grill destroyed, etc.

Damage to my truck was minimal cosmetically, but still added up to $2,200 in parts.

He was self insured and paid for everything.

ben