1. College of Materials Science and Engineering, Xi’an Shiyou University, Xi’an 710065, China
2. Xi’an Key Laboratory of High Performance Oil and Gas Field Materials, Xi’an 710065, China
3. Northwest Institute for Non-Ferrous Metal Research, Xi’an 710016, China
Titanium and titanium aluminides alloys have been widely used in the aerospace industry, but the lack of high temperature oxidation resistance is one of the main reasons that restrict their development. Based on the high temperature oxidation behavior, oxidation characteristics and failure mechanisms of several typical Ti-based alloys (industrial pure titanium, near αTi, α+β-Ti, β-Ti) and TiAl-based alloys (γ-TiAl, Ti3Al), the main ways (i.e,alloying and surface modification) to improve their high temperature oxidation resistance are reviewed. Optimizing the composition and content of the alloy element is necessary for alloying, which has limited effect on improving the high temperature oxidation resistance of Ti-based alloys and TiAl-based alloys. Surface modification includes applying high temperature protective coating, surface alloying and surface strengthening. Here, the development status of the nine typical high temperature protective coating systems for the Ti-based and TiAl-based alloys is reviewed，including Al coatings, Al-X coatings, Ti-Al-X coatings, MCrAlY coatings, quasicrystalline coatings, high-entropy alloy coatings, inert oxide ceramic coatings, enamel coating and nitride ceramic coatings. Furthermore, their processing methods, high temperature protection mechanisms, modification methods, failure mechanisms and application limitations are summarized. In addition, the application status of surface alloying technologies namely thermal diffusion, ion implantation, pre-oxidation and laser surface alloying as well as the surface strengthening technology in the high temperature protection of Ti-based and TiAl-based alloys are introduced. At this stage, advanced methods such as computer simulation and machine learning can be combined to design and prepare new high-temperature Ti-based structural materials. At the same time, developing the high-temperature protective coatings with excellent comprehensive properties and the corresponding efficient preparation methods is the key to promote the high-temperature application of Ti-based and TiAl-based alloys.