Elasticity refers to the ability of a material to return to its original shape after being stretched or compressed. Flexibility, on the other hand, refers to the ability to bend easily without breaking. In short, elasticity is about how much a material can stretch and return, while flexibility is about how easily a material can bend.

The muscles in your arm never expand; so when you bend your arm, your biceps contract as your triceps return to their regular form. When you extend your arm, you triceps contract as your biceps return to their regular form.

How far you can bend (or stretch) something before it fails to return to its original shape when released.

Of course if someone did not install a return bend or a vandal proof cap

The future tense of "bend" is "will bend" or "shall bend."