Almost always it is aluminum.
Aircraft bodies.
Aluminium is used in the manufacturing of aircraft bodies. It has a low density so the aircraft is lighter and is able to fly easily up in the air.
Aluminum.
the metal used in building most planes is alumiun as this type of metal as it can expand as the pressure in side the aircraft is greater than the pressure outside the aircraft. it is also the lightest suitable metal although boeing's 787 has been constucted with acompisite material.
aluminium alloy
Aluminium is a popular lightweight metal used in the manufacture of aircraft.
Mild Steel is a Ferrous Metal used for making Car and Fridge Bodies.
Iron
aluminium
Titanium(Ti)
Strong and lighweight metal used for contrruction of airplanes.
Mostly aluminium alloys, but some aircraft have used steel, titanium and more recently, composite materials.