3D printing technology is challenging the dominant position of traditional manufacturing processes, especially in the field of metals represented by titanium alloys. In this paper, the research status of mainstream printing technologies used in manufacturing titanium and titanium alloys is introduced. The basic forming mechanism and existing problems of each technology are analyzed in detail. The challenges of process application and possible measures to solve these problems are pointed out. Meanwhile, the main advantages and disadvantages of these technologies are compared for selecting the optimum 3D printing process according to the practical application requirements. The representative applications and related properties of various types of 3D printing titanium and titanium alloys are summarized, and the development direction of 3D printed high-performance titanium parts is pointed out.