Its fuselage is constructed entirely from carbon fibre, but also has a greater strength to weight ratio than traditional aircraft materials such as aluminum (the structure of the Eurofighter Typhoon and Boeing 787 Dreamliner are also made significantly out of it). The only significant metal component is the wing spar, running through the middle and reinforcing the wings.
The fuselage of this aircraft is entirely composed of carbon fiber, but it also possesses a superior strength-to-weight ratio compared to conventional materials like aluminum (the Eurofighter Typhoon and Boeing 787 Dreamliner also utilize significant amounts of carbon fiber in their construction). The only substantial metal component is the wing spar, which runs through the center and strengthens the wings.