The XRD pattern of the unit region is shown in Fig. 5b. The XRDresult reveals that the composite mainly consisted of TiC, TiB2, Cuand austenite without any intermediate phases. It indicates that theSHS reaction of the unit compact in the molten steel was complete.Fig. 5c shows the SEM microstructures of the unit region, whichshows that the TiC and TiB2particles in the unit region exhibited arelatively uniform distribution. The elongated or rectangular par-ticles were TiB2, while the nearly spherical particles were TiC. Inaddition, the result of EDS-point analysis indicates a relatively highconcentration of Fe and Mn element in the unit matrix as shown inFig. 5d. The scheme of the bionic composite material is shown inFig. 6. The bionic composite material was alternant combination ofmanganese steel matrix region and unit region in a relatively large(macroscopic) dimension. Thus, the melted steel fully infiltratedinto the reacting unit compact, leading to a good bonding of themelted steel with the TiC and TiB2ceramic particles.