The superplastic forming process of TA32 titanium alloy lattice structure, as well as the compression/bending mechanical properties and deformation characteristics in different parts of lattice structure were investigated by experiments and simulations. The results indicate that the optimized loading curve of gas pressure for superplastic forming meets the constraint of strain rate lattice structure deformation and the requirement of precision forming. Based on the finite element mesh after superplastic deformation, the simulation model of lattice structure mechanical properties was effectively constructed, and the preserving and transferring of superplastic deformation defects were achieved. Incomplete forming and rib distortion defects are observed at the edge skin part of lattice structure during the superplastic forming process. The deformation characteristics at the edge skin part of lattice structure during the compression process are mainly the interaction between the plastic buckling of ribs and the shear deformation of structure. The deformation characteristics during the bending process are mainly the plastic buckling of ribs and the wrinkling of upper panel. The compression and bending deformation characteristics of the central lattice structure are the plastic buckling of ribs and the formation of supporting structures between ribs and panel.