In this work, we demonstrate the enhancement of microwave attenuation capability of Ti₃C₂ enabled microwave absorbing materials (MAMs) within a frequency range of 2–18 GHz. Ti₃C₂ nano-sheet/paraffin composites exhibit enhanced microwave absorbing performance with an effective absorbing bandwidth of 6.8 GHz (11.2–18 GHz) at 2 mm and an optimal reflection loss of −40 dB at 7.8 GHz. Moreover, mechanisms for the dielectric responses of the Ti₃C₂ MXene nanosheets are intensively discussed. Three typical electric polarizations of Ti₃C₂ are illustrated with the Cole–Cole diagram. The enhanced microwave absorbing properties can be ascribed to the high dielectric loss accompanied with the strong multi-reflections between MXene layers.