What is a metal composed of two or more metals known as?

A metal composed of two or more metals is known as an alloy. Alloys are created to enhance specific properties such as strength, durability, corrosion resistance, and ductility, which are not typically found in pure metals. For example, steel is an alloy made primarily of iron and carbon, which significantly improves its strength compared to pure iron.

Compounds are substances formed when two or more elements chemically bond together, whereas alloys are mixtures of metals that retain their individual properties. An element refers to a substance that cannot be broken down into simpler substances, and a mixture involves two or more substances that are combined physically but not chemically bonded. Therefore, the unique characteristics and functionality of alloys define their classification, making the correct answer an alloy.