The general production and decay mechanism of ttBAR in future high-ene
rgy e+e- colliders has been investigated in a model-independent way, f
ocusing on an observation of possible CP violation. Angular asymmetrie
s sensitive to CP violation either in the production or in the subsequ
ent decays have been found. General considerations are illustrated thr
ough one-loop effects induced by gluino exchange in the supersymmetric
version of the Standard Model.