Abstract: This paper discusses the technology for the SPF of the TB2(Ti-5Mo-5V-8Cr-3Al) titanium alloy in corrugated plate (t=0.25mm) anelement of spacecraft structure. The paper includes the discussion of theparameters of forming process and experimental equipment.The resultsshow that rough grain plate of TB2 titanium alloy has good superplasticityat 750±10℃ when no treatment of refined structure is done.Because of thedynamical recrystallization during SPF,the grain becomes smaller.Also,both the strength (σ_b) and the plasticity (δ) are better. For the thin corrugatedplate of TB2 titanium alloy,forming dies made of strainless steel(1Cr18Ni9Ti)and its plane sealing structure can meet the practical demand of SPF.

Key words: Titanium alloy, Superplasticity, Forming process