Aircraft structure refers to the physical framework of an aircraft, designed to support its weight and withstand various forces during flight. It includes components such as the fuselage, wings, tail, and landing gear, all of which are engineered to ensure safety and performance. The materials used in aircraft structures often include aluminum, titanium, and composite materials, chosen for their strength-to-weight ratios. These materials help reduce overall weight while maintaining structural integrity, allowing for efficient flight and fuel economy. Proper design and maintenance of the aircraft structure are crucial for the longevity and reliability of the aircraft.