What causes tie-rods and stabilizer link-bars to go bad?

Question

Just bought a truck, the front end was noisy so they replaced the link-bars and the left tie-rod. All was covered by remaining factory warranty, but what caused the parts to go bad?

Answer 1

They are only damaged from hitting something, usually from sliding into a curb with the wheel turned.  Strange they covered it under warranty.  I guess that's not a bad thing though.

Answer 2

mileage and wear and tear.

Answer 3

Wear and tear.

Driving off road, rough roads, hauling heavy loads.