366 Prakt. Met. Sonderband 30 (1999) 
which are more intensely work hardened in the training process (“hard training”). The formation of 
the R-phase before the B2 — B19' transformation contributes to the increase of the TWSME ; 
stability. TWSME is accompanied with the presence of specific arrays of internal defects. These 
involve dislocation arrangements, presence of stabilized martensite and ghost martensite. These 
internal defects favor the formation of specific preferentially oriented martensitic variants with 
respect to other crystallographically “equivalent” variants. 
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