In this work, the thermal and energy properties of four types of textile wastes were evaluated: cotton, wool, polyester and acrylic. For this purpose, thermogravimetric analysis in nitrogen atmosphere with three heating rates in the temperature range 25-600ºC was used. The processing of the thermogravimetric curves allowed the determination of the temperatures at which 5% (T5%) and 30% (T30%) of the sample mass was lost, with which the statistical heat resistance index (THRI) of the textile waste was evaluated. Using the recorded thermogravimetric curves, the activation energy for the main stage of thermal decomposition was calculated by applying the ASTM E-698 standard method. The enthalpy of combustion of the textile waste was also determined using the Berthlot-Mahler-Krocker calorimeter.