A series of porous TiC materials have been synthesized on a parabolic flight plane by using chemical ovens and the effects of gravity on the microstructures of combustion products were studied. As a result of the present work, the morpholog ies of combustion products obtained in the present microgravity environment are quite different from those under normal gravity conditions. In microgravity, TiC materials with more uniform distribution and finer porosity could be attained.