Deformation behavior and formability of a Ti/STS dissimilar metal sheet were investigated through tensile and cupping tests, spanning a wide range of deformation rates and temperatures. After performing a series of high-temperature tensile test for Ti/STS 2-ply clad sheets, it should be noted that flow stresses exhibited maximum values at relatively higher strain rate regime in the samples subjected above 800 ℃, which promising feasible forming condition could be obtained at relatively higher deformation rate at temperature above 800℃. Maximum cup height of 13.8 mm was observed at 850℃ under the fast deformation rate of 30 mm/min. Furthermore, fracture mechanism was revealed by cross-sectioning of the cupping tested specimens, which is rationalized by finite element simulations.