Titanium alloy for aircraft fuselage

Titanium alloys for aircraft fuselage
Aircraft engines require alloys with good thermal strength and specific strength, while fuselage requires alloys with good strength, corrosion resistance, and lightweight, among other excellent characteristics at moderate temperatures. Titanium alloy can well meet these requirements, the use of titanium alloy as fuselage material has the following five advantages: 1) Replacement of steel and nickel-based high-temperature alloys can greatly reduce the quality of the aircraft. The high thrust-to-weight ratio allows titanium alloys to be used in aircraft components instead of steel, which has slightly better strength. 2) It can meet the strength requirements of aircraft.

Titanium alloys can achieve the same strength with about 60% of their mass. Titanium alloys can replace aluminium alloys at service temperatures above 130°C, the temperature limit for conventional aluminium alloys.
Good corrosion resistance. Most aircraft support mechanisms are under kitchens and toilets, which are prone to corrosion, and titanium alloys do not require surface anti-corrosion coatings or coatings.
Good electrochemical compatibility with polymer composites.
Space constraints, replacing steel and aluminium alloys.
A typical example of the use of titanium alloy due to space constraints is the titanium landing gear beam of the Boeing 747. This beam is the largest titanium forging, and although other alloys (e.g. 7075 aluminium alloy) are cheaper, the aluminium alloy landing gear is too large to fit within the wing when carrying the required mass. Steel is strong enough to carry the mass, but it adds significantly to the mass of the aircraft.