An　inverse　pole　figure　with　tensile-compressive　asymmetric　Schmid　factor　(SF)　was　developed　for　TiNi　shape　memory　alloys.　The　stress-induced　martensitic　transformation　behaviors　in　polycrystalline　TiNi　alloys　were　directly　visualized　and　mapped　by　in　situ　electron　backscatter　diffraction　(EBSD)　technique.　The　results　clearly　show　that　the　stress-induced　martensitic　transformations　sustaining　tensile　and　compressive　stresses　are　asymmetric.　The　observed　results　are　well　interpreted　by　the　Schmid　factor　inverse　pole　figure　(SFIPF).　It　was　also　suggested　that　the　internal　stress　distribution,　the　inter-grain　accommodation　and　the　constrained　effect　on　the　polycrystalline　system　are　additional　factors　impacting　the　formation　and　selection　of　Stress-induced　SF　habit　plane　martensitic　variants.　(C)　2008　Elsevier　B.V.　All　rights　reserved.