What types of metals are most commonly used in aircraft construction?

The most commonly used metals in aircraft construction are aluminum and titanium.

Aluminum is favored for its lightweight nature and excellent strength-to-weight ratio, which is crucial in aviation to ensure fuel efficiency and performance. It also possesses good corrosion resistance, making it suitable for the various environmental conditions that aircraft may encounter during operation.

Titanium is utilized for specific components that require high strength at elevated temperatures, such as in engine parts and airframe structures. Its strength-to-weight ratio is comparable to that of aluminum, but it is more resilient under extreme conditions, which is particularly advantageous in aerospace applications. Additionally, titanium has outstanding resistance to corrosion, enhancing the longevity and safety of aircraft components.

The combination of aluminum and titanium allows for optimal performance in aircraft design, aiming for both aerodynamics and structural integrity while keeping weight to a minimum. This is why these two metals are the most commonly selected materials in the aerospace industry.