In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

Malleability , a similar property , is a material 's ability to deform under compressive stress ; this is often characterized by the material 's ability to form a thin sheet by hammering or rolling .
If malleable , a material may be flattened by hammering or rolling .