Here is a goal: To restraigthen a bent PVC conduit.

How would you accomplish this goal?
Use a heat source on the conduit. Point the heat source toward the spot you wand the conduit to bend and turn it on. Bend with your hands gently to straighten it out. Be sure to wear gloves doing so or you might be burned. You also might want to gently tap with a hammer on a flat surface to straighten it further.