Differential scanning calorimetry (DSC) has been employed to study the phase transformation in glassy Se70Te2-M10 (M = Ag, Cd, Sb) to understand the glass forming tendency (GFT) and rate of crystallization. The difference (T-c-T-g) (indicator of GFT and thermal stability) has been determined by DSC thermograms for each sample. The values of T-c and T-g are found to depend on GFT. The rate constant K (indicator of rate of amorphous to crystalline phase transformation) has been evaluated using method of Augis and Bennett. The parameter K is also found to be related with (T-c-T-g). (C) 2004 Kluwer Academic Publishers.