Which material is lightweight with low density and used for aircraft bodies and beverage cans?

• A. Aluminium alloys
• B. Titanium
• C. Zinc
• D. Bronze

Answer: (A)

Lightweight materials with low density that still provide good strength and formability are ideal for applications like aircraft bodies and beverage cans. Aluminium alloys fit this perfectly because aluminum has a very low density (about 2.7 g/cm3), giving a high strength-to-weight ratio when alloyed. These alloys deliver a blend of strength, ductility, corrosion resistance, and easy manufacturability, which is why they’re standard for aircraft structures and for making thin-walled cans.

Titanium, while strong, is denser and more expensive, making it less practical for widespread use in cans. Zinc and bronze are denser materials and don’t offer the same combination of lightness and workability needed for both aircraft components and beverage packaging.