Origin of {112} < 111 > antitwinning in a Ti-24Nb-4Zr-8Sn superelastic single crystal

$${\left\{112\right\}\langle {111}\rangle }_{\beta }$$ twins are observed in a superelastic β Ti-24Nb-4Zr-8Sn (wt.%) single crystal after tensile test. A careful Schmid factor analysis shows that these formed the antitwinning sense regarding classical twinning system of bcc structures. These then antitwins. Moreover, full stress-induced martensitic (SIM) transformation phase into α" martensite is evidenced from situ synchrotron X-ray diffraction. This fully accomplished before onset plastic deformation and, turn, formation twins. From crystallographic reconstruction, antitwins shown to be passively reversion, during reverse SIM when stress released, $$ \left\{ {110} \right\}\left\langle \right\rangle _{{\alpha ^{{\prime \prime }} }}$$ actually martensite. The occurring plays key role activation systems by reducing both shear and shuffle magnitudes twinning. Variant selection show can never activated titanium alloys involving transformation, while non-classical always favored.