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Titanium diboride (TiB2) appears to be a promising material for corrosion prevention in aluminium industries. This paper first predicted the possibility of TiB2 formation in Ti-B-C system, and then focused on the preparation of TiB2 coatings by electroplating on the graphite in fluoride-chloride electrolytes (KF-KCl) containing K2TiF6 and KBF4 as the electrochemically-active components. The effect of current density and electroplating techniques on the surface leveling, compaction and grain size of coatings was investigated. The results show thick, adherent and uniform TiB2 coatings are obtained when the current density is 0.8 A/cm2; compared with continuous current plating (CCP), the surface leveling and compaction of coatings deposited by periodically interrupted current (PIC) are remarkably improved, and the crystal grain is finer. XRD analysis indicats that the coatings are composed of relatively pure TiB2 and the preferred orientation of coatings is (001) plane under experimental conditions, which is in accordance with the prediction of the two-dimensional crystal nuclei theory.