Nano-TiC powder was prepared by a high-energy ball-milling method.The morphologies of the samples milled with different time were analyzed by X-ray diffraction（XRD）

scanning electron microscope（SEM） as well as transmission electron microscopy（TEM）

and the formation mechanism of TiC was presented.The results show that graphite and titanium powder are refined firstly in the milling process

then graphite becomes flake

while titanium powder becomes small particles.And then almost all the titanium powder is wrapped by the flake graphite.When the temperature generated by the collision of ball reaches the reaction temperature of Ti and C

TiC is generated

and the reaction can keep advance with the help of the release heat of the reaction.The size of TiC particles is about 10

100 nm.