Type of materials

Structural materials fall into four important categories: metals, polymers,
ceramics, and composites. Metals are the most obvious materials and cover
everything from bronze and iron through steels, exotic metals like titanium
and zirconium, and alloys of two or more metals.
Polymers cover everything from wood and fibers to glues, rubber, Bakelite,
nylon, acrylic, and all the plastics. Ceramics include stone, glass, cement,
bricks, and pottery.
Composite materials have as long a history as all the others, starting with
mixtures of straw and mud to make primitive bricks through laminates of
different woods (such as plywood). Their history in aircraft manufacturing is
also long; even the massive Spruce Goose used laminated wood for its skin.

This is non technical stuff but you know great information about what physicist called mass / material so think over it.