The Ti-Al system intermetallic compounds and composites fabricated through Ti and Al，such as TiAl3, γ-TiAl and α2-Ti3Al intermetallic compounds, and Ti/Al, Ti/α2-Ti3Al, Ti/γ-TiAl, Ti/TiAl3,Ti/TiAl3/Al and Al/TiAl3 metal-metal and metal-intermetallic compound composites, have good application prospects in aerospace, automotive and other fields owing to their excellent physical, chemical and mechanical properties. The preparation of the above materials involves a variety of Ti-Al reaction diffusion processes. Therefore, an in-depth understanding of Ti-Al reaction diffusion mechanism and kinetics will help to prepare Ti-Al intermetallic compounds and composites reasonably and efficiently. At present, Ti-Al reaction diffusion mechanism and kinetics have been extensively studied, but there are still many divergences on some conclusions. In part II of this paper, the research progress of Ti-Al reaction diffusion kinetics involved in the preparation of Ti-Al intermetallic compounds and composites is reviewed, and the future research direction of Ti-Al reaction diffusion kinetics is prospected.