Materials of Construction – Properties, Testing, and Standards Practice Test

Malleability is the ability of a material to be deformed plastically by compressive forces, such as hammering or rolling, into thin sheets without cracking. This plastic flow lets atoms slide past each other without creating fractures, enabling sheet formation. Metals like gold, copper, and aluminum are classic examples of highly malleable materials.

Stiffness describes resistance to elastic deformation, which isn’t about forming sheets. Flexibility means bending easily, but that doesn’t guarantee the material can be formed into sheets without breaking. Toughness is about absorbing energy before fracture, not about forming shapes under compression. Ductility relates to drawing into wires, a form of plasticity, but sheet-forming is specifically malleability.