“…Two other deformation twinning systems were also observed: {103}<301>α″ compound twinning [37] and {315}'<121>'α" type I twinning [35]. More recently, dislocations were also evidenced in α″ phase by TEM [39]. However, deformation mechanisms of α″ phase can slightly differ between superelastic alloys and full α″ shape memory alloys because of obviously different beta-stabilizing alloying element contents.…”