In the work one investigated the behavior of loop of hysteresis of alloy TiNi when realizing pseudoelasticity effect by ultrasound influence with a frequency of 22 kHz and amplitude of mechanical stresses up to 100 MPa. It is determined that simultaneous action of static loading and ultrasonic vibrations leads to a change of the hysteresis loop width. Depending on the conditions of ultrasound influence by loading it is possible both to increase and decrease stress of flow of a material. By unloading ultrasonic vibrations couse a growth of stress of flow, and narrow the hysteresis loop. Thus, the possibility of handling the width of pseudoelastic loop of hysteresis of TiNi due to excitement of ultrasonic vibrations is shown. The model explaining the observed effects due to force and heat constituents of ultrasound influence is offered.