1. High cost: The difficulty of mining and processing titanium results in relatively high production costs for titanium alloys, which limits their wider application. Although countries are making efforts to reduce the application cost of titanium alloys and have achieved some success, the current situation in China is that the management and technological level have not yet reached the ideal height, and the price competitiveness of titanium alloy products is poor internationally, which is not conducive to further expanding their use. Reducing costs is one of the key challenges faced by titanium alloys in the aerospace industry, which requires further optimization of production processes, improvement of production efficiency, and reduction of raw material costs.

2. High processing difficulty: The physical properties of titanium alloys require precise processing equipment and technology. During the processing, the processing difficulty is high, which increases the complexity of manufacturing and the manufacturing cost of the finished product. For example, traditional 3D printed titanium alloy workpieces may have subtle voids due to the lack of traditional forging, stamping, and other processes, which may affect the strength of the workpiece. Therefore, it is necessary to continuously improve the processing technology and techniques to enhance the processing quality and efficiency of titanium alloys.

3. High temperature performance needs to be improved: Although titanium alloys have good heat resistance, their stability still faces severe tests in ultra-high temperature environments, such as the extremely high temperature conditions generated when spacecraft re-enter the atmosphere. Developing titanium alloys or coatings that are more resistant to high temperatures to maintain their mechanical properties under extreme conditions is one of the current research hotspots.

4. Production and quality issues: In terms of China's situation, although it is a major titanium industry country, the quantity of high-quality products in production is not high, and there are few types of titanium products with special properties. In addition, China is still unable to produce titanium strips and titanium extruded profiles in large quantities, which to some extent limits the development and utilization of titanium and titanium alloys in aerospace and other fields. It is difficult to further increase the amount of titanium used in aircraft engines and other equipment.

5. Difficulty in comprehensive performance optimization: Due to the high chemical activity of titanium metal, it is easily contaminated by other elements, so the processing and manufacturing process requirements for titanium alloys are very high. At the same time, the high-performance products produced require comprehensive consideration of their mechanical, physical, chemical, and process properties, which poses challenges for the research and production of titanium alloy materials that meet various demanding requirements.

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