| Summary: | TiC<sub>x</sub>/Al composites were successfully prepared in this study by dissolving graphite particles in Al-Ti melt based on the principle of a solid–liquid in situ reaction. It was observed that the microstructure of the TiC<sub>x</sub>/Al composites changed with changes in the reaction temperature and graphite particle size. With an increase in reaction temperature, the TiC<sub>x</sub> particles in the TiC<sub>x</sub>/Al composites transitioned from a spider-like distribution to being evenly dispersed in the Al matrix. Additionally, the morphology of the TiC<sub>x</sub> particles changed from polygons of various sizes to quasi-spherical shapes with a uniform particle size, while the presence of Al<sub>4</sub>C<sub>3</sub> and Al<sub>3</sub>Ti in the matrix diminished. The size variation of the graphite particles had minimal impact on the particle size and stoichiometric ratio of TiC<sub>x</sub> generated in the sample. Furthermore, an appropriate graphite particle size was found to mitigate the agglomeration and residue of graphite particles during the in situ reaction.
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