Aluminum 6061 is a widely used, heat-treatable alloy known for its excellent strength-to-weight ratio, corrosion resistance, and versatility. It offers good machinability and can be anodized for improved surface hardness and appearance. 6061 performs well in both structural and precision parts, making it a popular choice in aerospace, automotive, electronics, and general engineering applications. Its balance of mechanical strength, light weight, and workability makes it one of the most commonly selected aluminum alloys for CNC machining.