sentence2_structure: The malleability of materials<>describes<>the ease in which they can be molded into thin sheets$$$they<>can be molded<>into thin sheets<>the ease
sentence1: Malleability is a physical property of metals that defines the ability to be hammered, pressed, or rolled into thin sheets without breaking.
sentence2: The malleability of materials describes the ease in which they can be molded into thin sheets.
question: What property of materials describes the ease in which they can be molded into thin sheets?