Alloys are materials made by combining two or more metals, or a metal with another element, to enhance their properties. Common examples include steel, which is an alloy of iron and carbon, and bronze, made from copper and tin. These combinations can improve strength, corrosion resistance, and other characteristics, making alloys essential in various applications. The use of alloys dates back thousands of years, with ancient civilizations creating them for tools and weapons. Today, alloys are crucial in industries such as construction, automotive, and aerospace, where specific material properties are required for safety and performance.