In-situ TiC particle reinforced ferrous matrix composites with different contents were fabricated by added Ti metal during melting process of the No. 45 plain carbon steels. The microstructure of composites was analyzed and performance was measured. The results showed that different volume fraction of TiC particle reinforced ferrous matrix composites can be fabricated by using simple melting casting method. The shape of the most TiC in composites was fine and regular triangular or quadrilateral. The TiC quantity increased with the increasing of the Ti addition. As the content of TiC increased to the certain amount

facet dendrite TiC formed. The hardness of composite increased with the increasing of the TiC content. The formation of TiC reduced carbon content in matrix when Ti was only added during material fabrication. It led to Fe3C in the matrix decreasing or disappearing. The macro hardness shows pre-increasing and post-decreasing with the increasing of Ti content. The non-stoichiometric TiCx with carbon lack and the strip Fe2Ti intermetallic compounds formed by the excessive titanium.