When a force acts on an object, the object may change shape by bending, stretching or compressing - or a combination of all three shape changes. However, to change the shape of a stationary object there must be more than one force acting to do the following.
Bend an object's ends past each other - eg when an archer pulls an arrow back against a bow.
Pull an object's ends apart - eg when a rubber band is stretched.
Push an object's ends together - eg when an empty drinks can is squashed.
A change in shape is called distortion:
A rubber band undergoes elastic distortion when stretched a little. A metal drinks can undergoes inelastic distortion when it is squashed.