Metal fusion is the process of combining two or more metals to create a new material. ALLOY is one type of metal fusion, which is a combination of two or more metals that are melted and mixed together to form a single substance. Alloying can be used to create materials with improved properties such as strength, corrosion resistance, and electrical conductivity. Alloying is an important part of many industrial processes, and is used in the production of items such as aircraft parts, car parts, and jewelry.