This research work consisted to synthesize materials based on aluminum titanate and mullite by conventional sintering in air between 1300 and 1500 ° C. The three compositions tested consist of the following starting raw materials: corundum, rutile, kaolin and feldspar. Mullite is the first compound formed, but appeared to 13500C titanate. A 15000C, XRD diagrams testified to the existence of balance-only (titanate and mullite). The apparent density measured on the samples thermally treated 15000C showed values between 69 and 74% of the theoretical density.