In the current investigation, mechanical alloying technique was utilized to produce a nanocomposite TiAl/TiC/TiAl 2 C coating on Ti substrate. Poor wear resistance and low hardness of Ti hinder its further application. Fabrication of high resistance coating on Ti substrate is one of the beneficial ways to improve its trybological properties. TiAl intermetallic compounds are noteworthy because of high oxidation resistance and good mechanical properties. One of the most promising methods recently utilized for coating is mechanical alloying. The coating process along with mechanical alloying was the results of repetitive cold welding and fracturing of powder particles with each other and with hard specimen surface due to ball-powder-substrate impacts. Three approaches were considered to fabricate TiAl/20 wt% stoichiometric composition. First, Mechanical alloying of Ti-Al-C; Second, Mechanical alloying of Ti-Al-TiC and at last Mechanical alloying of Ti-Al-C powder in planetary ball mill for 70 hours. In this study, milling time, ball to powder ratio (BPR) and ball size on thickness, hardness and coating morphology was examined. The samples milled for different time were subjected to heat treatment at 900°C for 90 min in vacuum furnace. In this regard, X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were employed to investigate phase transformation, microstructural and morphological evolutions. Microhardness and roughness were also used to characterize mechanical properties of the coating. As the result of first method, the best coating was formed by 4mm ball size and BPR of 10:1 which increasing in ball size and BPR led to formation of non-uniform coating. The final grain size of 12 h milled sample was estimated to be around 18 nm. Hardness and coating thickness was increased by increasing milling time which they reached 460 HV and 43 µm respectively. Roughness also decreased by milling time. Nano Scale AlTi 2 C, AlTi 2 , and TiC phases were detected after heat treatment. The approximate grain sizes of AlTi 2 C and AlTi 2 after 12 h of milling was 35 nm while that of TiC phase was about 20 nm. Hardness and roughness of coating surface also increased after heat treatment. In the second approach, TiC particles led to the formation of non dense coating, specially, in the first stages of milling. The roughness and hardness increased due to increasing in mechanical alloying time. Al 3 Ti/TiC/AlTi 2 C nanocomposite coating formed in the first stage of milling and AlTi 2 /TiC/AlTi 2 C nanocomposite coating was detected by increasing in milling time. In third method, Al-Ti-C powder was milled by planetary ball mill for 70 hours and then coated on Ti sub-layer. Because of the presence of brittle powder, coating morphology was non-uniform and dense. Keywords: Mechanical alloying, coating, intermetallic compounds, nanocomposite