Given the complex nonlinear nature of SMA responses, understanding their coupled thermomechanical responses of different components has been of significant interest for both researchers and application developers [1]. SMA component responses in different applications can be significantly affected by several factors like material compositions, component geometries, operating temperature, loading conditions, loading rates, thermomechanical history, processing conditions etc. and mostly combination of several of these parameters in many cases. Since these materials demonstrate complex non-linear responses due to phase transformations resulting in microstructural changes, it is imperative to understand their influence on the overall mechanical response of SMA components. The factors listed below and their affect on the mechanical response is taken up in this chapter.