Composites are not a primary material classification, but rather a combination of two or more materials.

Metallic bonding is the primary bonding mechanism in metals, characterized by the sharing of free electrons among metal atoms.

Sintering is typically used for ceramics, not metals.

Ionic bonding is the primary bonding mechanism in ceramics, characterized by the attraction between positively and negatively charged ions.

Injection molding is typically used for polymers, not ceramics.

Covalent bonding is the primary bonding mechanism in polymers, characterized by the sharing of electrons between atoms.

Forging is typically used for metals, not polymers.

Composites can have multiple bonding mechanisms, depending on the materials used.

Casting is typically used for metals and ceramics, not composites.

The bonding mechanism between atoms determines the strength of a material.

Conductivity is not a material property, but rather a measure of a material's ability to conduct electricity or heat.

The microstructure of a material, including grain size and defects, determines its toughness.

Soldering is a joining process, not a manufacturing process.

The atomic structure of a material, including the presence of reactive elements, determines its corrosion resistance.

Ductile fracture is not a common material failure mechanism, as it is typically preceded by plastic deformation.