Glassy samples of the system Se100—xInx, (where x = 5, 10, 15 and 20 at%) were prepared by the usual melt‐quenching technique, and their amorphous nature was identified by X‐ray diffraction. The phase transformations (glass–amorphous, amorphous–crystalline and melting) were studied by two methods, that of Ozawa and Kissinger. The DTA thermograms of the samples were recorded at heating rates 10, 30 and 50 K/min. The glass transition temperature (Tg), the crystallization temperature (Tcp), and the melting temperature (Tm) were found to be heating rate dependent. The calculated values of the activation energy of crystallization were 13.3, 33.76, 18.52, 15.27 kcal mol—1 (by Kissinger's method) and 11.71, 29.79, 14.99, 14.89 kcal mol—1 (by Ozawa's method) for the compositions x = 5, 10, 15 and 20 at% respectively. The internal friction Q—1 as a function of temperature was investigated by a magnetostrictive technique for the Se95–In5 glass in the frequency range 30 to 50 kHz. Two well‐defined peaks appeared and confirmed those observed by DTA measurements of this work.