The concept and the development background of titanium matrix functionally gradient materials(FGM)complex structure are introduced.The macro-meso-scopic scale of research results of FGM are reviewed and the development trends in the area are prospected.By gradually varying the volume fraction of the constituent materials, their material properties exhibit a smooth and continuous change with respect to the spatial location, thus being void of interface problems that are usually associated with fiber-reinforced composites and with less severe thermal stress concentrations. FGMs are now developed for general use as structural components in extremely high temperature environments. The current status of research and the application prospects for materials optimization analysis of FGM complex structure are especially discussed.Future research needs are highlighted.