Titanium alloy hollow lattice has excellent mechanical properties and physical functions

which is a typical load-function integration structure

and has good application prospects in future aircraft. The superplastic tensile elongation of TA15 and TA32 titanium alloys was measured by uniaxial tensile method at different temperatures and strain rates

the maximum elongation reached 1450% and 950% respectively. The diffusion bonding tests of TA15 and TA32 titanium alloys were carried out at different temperatures and pressures. According to the superplastic tensile and diffusion bonding tests

the optimal process parameters of superplastic forming and diffusion bonding were determined as 920 ℃/1.5–2.0 MPa/2 h. The hollow lattice structure of TA15 and TA32 titanium alloys with different configurations and geometric parameters were formed by superplastic forming/diffusion bonding (SPF/DB) process at optimal craft. The mechanical properties of titanium alloy hollow lattice were measured by flat compression and three-point bending method

the maximum strength reached 23.83 MPa and 596 MPa respectively. The influence of geometric parameters on the flat compression and bending properties of titanium alloy hollow lattice was studied by means of finite element analysis and experimental analysis. The thermal insulation performance of titanium alloy hollow lattice structure was studied by measuring the temperature difference between the cold and hot surfaces by single-side heating method. At 400 ℃/1 h

the thermal insulation temperature difference reached 276.3 – 310 ℃.