The paper considers the features of shape change of ring-shaped force elements made of TiNi alloy during thermocycling. Non-monotonic deformation characteristics were obtained. The decrease in the sample shape during thermocycling is associated with incomplete martensitic transformation of the material due to temperature shifts during training. Holding of the sample in the martensitic state can lead to stabilization of the martensitic transformations’ temperatures and an increase in the proportion of martensite in the ring material. It can increase the shape change of the ring.