| Summary: | In this work, chemical vapor infiltration (CVI) was combined with reactive melt infiltration (RMI) using Ti−6Al−4V titanium alloy powder to prepare C<sub>f</sub>/C−TiC composites. The microstructure and composition of C<sub>f</sub>/C−TiC composites were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The flexural properties of the composites were also analyzed. The results indicated that the Ti−6Al−4V titanium alloy infiltrated the C<sub>f</sub>/C preform and reacted with the pyrolytic carbon (PyC) to form a TiC−VC and Al<sub>4</sub>C<sub>3</sub> matrix, and no residual Ti, Al, or V was detected. Moreover, Al<sub>4</sub>C<sub>3</sub> was concentrated and independently distributed, whereas Ti and V reacted with C to form a TiC−VC solid solution. The porosity was 6.75%, and the bulk density of C<sub>f</sub>/C−TiC was 1.96 g/cm<sup>3</sup>. The flexural strength, flexural modulus, and failure strains were 256 ± 18 MPa, 89 ± 9 GPa, and 0.93 ± 0.13%, respectively. The work of fracture of the C<sub>f</sub>/C−TiC composite was about 6.8 ± 0.38 KJ/m<sup>2</sup>. Due to the propagation and deflection of cracks, as well as debonding and fiber pullout, the C<sub>f</sub>/C−TiC composite showed ductile fracture behavior.
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