After the colloidal proton acid treatment, the preparation of titanium carbide Ti₃C₂T_x was achieved. In addition, the single-walled carbon nanotube (SWCNT) was used as reinforcement to improve the mechanical properties of proton acid treated titanium carbide (H-MXene): the tensile property is enhanced by nearly 400% while the electromagnetic shielding performance is retained. This study demonstrates that the H-MXene and carbon nanotube have great potential in electromagnetic interference (EMI) shielding composite materials with excellent mechanical properties.