Final answer:
An alloy is a substance consisting of two or more metals combined to improve the properties or usefulness of the base metal.
Step-by-step explanation:
The term for a substance or mixture composed of two or more metals fused together and dissolved into each other is called an alloy. Alloys are created to enhance the properties or usefulness of a base metal. For example, steel is an alloy of iron and carbon, which is stronger and harder than pure iron.
Likewise, bronze, made from copper and tin, is more durable than its constituent metals. Thus, the use of alloys is critical in various industries where specific material properties are needed.