What properties of duralumin make it more useful than its constituent metals?

Duralumin is an alloy made from aluminum, copper, and magnesium. The properties of duralumin that make it more useful than its constituent metals are its strength and lightness. Duralumin is much stronger than pure aluminum, which makes it suitable for use in applications where high strength-to-weight ratios are important, such as in aircraft construction. Additionally, duralumin is resistant to corrosion and has a high level of ductility, which means it can be easily shaped without breaking. Therefore, duralumin has a combination of properties that make it an excellent material for many industrial applications, including aircraft construction, automotive parts, and structural components.