This paper reports a study on the mechanism of intercalation of alpha,omega-alkyldiamines NH2(CH2)(n)NH2 (n = 2-9), into layered alpha-titanium phosphate, alpha-Ti(HPO4)(2) . H2O. The intercalates synthesis was performed by titrating the host with aqueous solutions of alkyldiamine at 25%C. Crystalline phases showing a general formula alpha-Ti(HPO4)(2) . xNH(2)(CH2)(n)NH2 . H2O (x less than or equal to 1) have been obtained. In every case, a monolayered arrangement of alpha,omega-alkyldiamine molecules into the host layers is formed. The average inclination angle of the alkyldiamine molecules to the phosphate layer and the intercalates packing density have been determined.