Graphene nanoplatelets (GNPs)-reinforced titanium matrix composites (GNPs/Ti) have been found in extensive applications in aerospace and deep-sea industries, owing to their exceptional properties, including low density, high specific strength, and superior plasticity. GNPs are often incorporated into titanium matrix composites because of their excellent properties. GNPs/Ti matrix composites have strong deformation resistance at room temperature and need to be manufactured at high temperatures. However, high temperatures could result in an interfacial reaction between Ti and GNPs, forming large TiC particles and damaging the GNPs structure, hindering the enhancement effect. Therefore, controlling the interface reaction is crucial for addressing these challenges. This study thoroughly explores existing literature on GNPs/Ti matrix composites, focusing on preparation techniques, interface structure, and interface management. At the same time, the properties of some graphene nanoplatelets or the borides nanowires-reinforced metal matrix composites are also analyzed. It particularly emphasizes challenges in interface control, encompassing the surface modification of GNPs and its effects on microstructure and mechanical properties, control of the interface reaction, and the structure design of a 3D network interface and its effects on mechanical properties. Currently, optimizing the performance of GNPs/Ti matrix composites remains elusive. However, by improving the preparation method, modifying the surface of graphene, controlling the interface reaction and adjusting the interface structure, the interface characteristics can be improved, thereby improving the performance of GNPs/Ti composites.

The effects of different heat treatment regimes on the microstructure and corrosion behavior of selectively laser melted (SLM) Corrax (CX) stainless steel were systematically investigated. Three distinct thermal processing approaches solution treatment (ST), aging treatment (AT), and combined solution aging treatment (ST + AT) were comparatively examined to assess their microstructural evolution and corrosion performance. The results demonstrated that the SLM-processed CX sample initially consisted of martensite and retained austenite. After solution treatment at 900 °C for 0.5 h, microsegregation was eliminated, and the retained austenite fully transformed into martensite. During direct aging at 525 °C for 3 h (AT), a portion of the martensite reverted to austenite, accompanied by grain refinement that reduced the average grain size to 1.79 μm. When the CX was solution-aged at 900 °C for 0.5 h and then 525 °C for 4 h (ST + AT), the retained austenite transformed completely into martensite. The results of potentiodynamic polarization measurements and electrochemical impedance spectroscopy (EIS) revealed that the aged specimen demonstrated comparatively superior corrosion resistance with reduced surface accumulation of corrosion products relative to both ST and ST + AT specimens. The electrochemical test results indicate that the selection of heat treatment parameters has a significant impact on the corrosion resistance of SLM-formed CX samples. Compared to ST and ST + AT, the corrosion performance of AT-treated samples is improved to a certain extent, with the highest E_pit (322 mV) and the largest ΔE (742). The corrosion potential is relatively high (E_corr, −414 mV vs. SCE), and the corrosion current density is relatively low (I_corr, 0.405 μA·cm⁻²). This indicates that the AT samples exhibit good corrosion resistance.