Shape memory alloys belong to the class of functional materials with unique properties that make them useful in many engineering applications. Since in the austenitic state, due to the pseudoelasticity effect, such alloys have a significant damping capacity, and one of the possible applications is vibro-protection devices. Working elements of damping devices made of shape memory alloys are used in the conditions of cyclically varying stresses and/or temperature. The theoretical models adequately describing such behavior make it possible to advance the efficiency of damping devices. The paper aims at the microstructural modeling of alternating deformation of the sample of TiNi shape memory alloy. Phase transformations in the materials with the martensite channel of inelasticity take place with the release and absorption of heat, which can lead to a shift in the working temperatures of the element and the change in its functional properties. Consequently, when theoretically describing the mechanical behavior of