An alloy refers to a type of mixture made up of chemical elements. It contains atleast one metal. Alloys are used widely as construction materials in many industries. The manufacturing technology, the chemical composition, and (micro) structure of the alloy, all influence the functional qualities of these materials. Some of the popular alloys are steel, brass, bronze, and sterling silver. They have a wide range of applications in the making of tools and automobiles. They are also used within the aerospace industry. Research in this field focuses on improving the functional qualities of construction materials in order to lower their weight and boost their safety of usage. Alloying elements are combined with the base metal in order to obtain various desired qualities such as toughness, hardness, and ductility. This book explores all the important aspects of engineering alloys in the present day scenario. It contains a detailed explanation of their structure and properties. Those in search of information to further their knowledge will be greatly assisted by this book.