A new process for producing Ti-Al intermetallic composites was developed. The process consisted of the repetitive roll-bonding for making a laminated Ti/Al sheet and the subsequent heat treatment promoting a solid phase reaction in the laminated Ti/Al sheet. In order to finally obtain two-phase intermetallics of TiAl and Ti3Al, the roll-bonding was first conducted by adjusting the thickness of Ti and Al sheets. The 55-layered sheet, which had an alternately stacked structure of Ti and Al with the surface layer of Ti, was prepared in this study. The heat treatment for reactive diffusion was composed of three stages: (1) the 1st heat treatment below a melting point of Al, (2) the 2nd heat treatment below the α to β transformation temperature of Ti and (3) the 3rd heat treatment for obtaining the two-phase intermetallics of TiAl and Ti3Al. It was found that the formation of voids due to interdiffusion took place mainly in the formation process of Al3Ti. An intermittent or continuous pressure such as hot rolling and compression is therefore required at the 1st stage to produce void-free materials. Depending on heating temperature at the 3rd stage, two different types of microstructures, that is, the macroscopically stacked layer structure and the fully lamellar microstructure of TiAl and Ti3Al were formed.