The cohesive properties of A13V in the two different structures (DO22 and Ll2) were in-vestigated by means of local density total energy approach. The calculated lattice constant (α= 3.72?, c = 8.20?) for A13V in DO22 structure is in agreement with experiment, the bulk modulus (1.3 Mbar) is consistent with the experimental Young modulus for Al3Ti, and the calculated formation energy (29±1 kcal/mol) agrees reasonably well with experimental value (26.0kcal/mol).