The BaO - TiO2 – B2O3 system was studied by several researchers [1-6]. Glasses were obtained by melting at 1150-1450°C. Two glass samples first, coded B1 with 20 mol % B2O3 and the second, coded B3 with 50 mol % B2O3 were analysed. The DTA results show in evidence that sample B1 had higher crystallization tendency due to the lower B2O3 content. A pronounced crystallization peak at 688 ° C and a very low one at 744 ° C can be observed, which can be assigned: the first to BaTi(BO3)2 and the second to Ba2Ti2B2O9, which melt at 927 °C and 982 °C, respectively. For the sample B3, three crystallization temperatures were found at 689; 739; and 791 °C. The crystallization peaks are reduced in amplitude, indicating that this sample has lower crystallization tendency. DTA analysis at different heating rates (5, 10 and 20 oC/min) was used in order to establish the kinetics of the crystallization process. Crystallization kinetics is interpreted in terms of standard nucleation and crystal growth based on the obtained data. The kinetics of the non-isothermal crystallization of the B3 sample was studied using DTA curves recorded at different heating speeds (10, 15, 20 oC/min). Recent researches show in evidence new methods to obtain the variation of activation energy to conversion degree [7-13]. The microhardness of the glass samples B1 and B3 was determined by Vickers method using 50, 80 and 100 g loads.