Metal alloys are materials made by combining two or more metals, or a metal with other elements, 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, durability, corrosion resistance, and other characteristics. Alloys are widely used in various industries, including construction, automotive, and aerospace, due to their improved performance compared to pure metals. For instance, aluminum alloys are lightweight yet strong, making them ideal for aircraft, while stainless steel is valued for its resistance to rust and staining in kitchenware and medical instruments.