## 1 Introduction  
Titanium alloys are widely used in various fields because of their high strength, corrosion resistance, and heat resistance properties. However, at the same time, owing to the characteristics of titanium alloy, such as small deformation coefficient, high specific strength, good toughness, and so on, it is easy to produce a high temperature when milling titanium alloy, and the cutting force per unit area is large and the tool wear is serious. Especially in precision milling applications (i.e., a very small amount of material is removed), overly high milling temperatures are the main cause of tool wear and the poor surface quality of workpieces. In the actual production process, the blunt radius of the cutting edge has a significant effect on the force thermal characteristics in the cutting process. Especially in precision cutting, the cutting work is mainly completed by the cutting edge of the cutting tool, which is the first part to contact the workpiece. Changing the shape of the cutting edge has directly influenced the cutter-workpiece contact state and modifies the length of the cutter-workpiece contact state across three heat source regions, resulting in changes in the generation and transmission of cutting heat. Therefore, the blunt radius of the cutting edge has an important influence on the cutting temperature in the cutting process. [PERSON] and [PERSON] [1] take the blunt radius of the cutting edge of a titanium alloy TioAl4V end milling cutter as the research object. The experimental results show that the milling temperature initially decreases, and then tends to smooth with an increasing cutting-edge radius. [PERSON] [2] has studied the turning process of austenitic stainless steel AISI 316 Lwith different cutting radii of a cemented carbide cutter; the authors report that the cutting temperature increases with the increase of the blunt circle radius in the range of 0.02-0.1 mm. [PERSON] et al. [3] use the Advantedge 3D software to simulate the milling process of 45 steel with different cutting radii of a blunt circle radius end milling cutter. The curves of the cutting radii are increased from 0.02 mm to 0.08 mm; the authors report that the milling temperature initially decreases, and then increases with the increase of the cutting-edge radius. The lowest milling temperature occurs when the cutting-edge radius is 0.06 mm. [PERSON] and others [4] used abaqus to simulate the process of cutting 45 steel with a cemented carbide blade with a blunt edge. The authors report that increasing the radius in the range of 0-0.02 mm presented a decreasing cutting temperature. However, in the cutting-edge radius range of 0.02-0.1 mm, the cutting temperature gradually increases as the radius increases. In order to study the effects of the cutting edge on the hard cutting performance of the tools, [PERSON] [5] and others have used the Advantedge finite element simulation software to simulate hardened bearing steel with five kinds of tools with different blunt radii. The research has found that the high temperature area of the cutting tools increases with the increase of the blunt radius, and the highest cutting temperature is located near the cutting edge. According to a large number of studies, when cutting titanium alloy and other difficult-to-machine materials, placing a micro-pit texture on the surface of the tool can improve the processing quality of the workpiece and prolong the service life of the tool. The micro-pit texture plays a role in grinding and anti-wear in the process, so that the cutting force and cutting temperature are reduced. The diameter, spacing, distance from the cutting edge, depth, and other parameters related to the pits have different effects on the cutting force and temperature. The reasonable selection of the parameters for the micro-texture is of great significance for improving the machining quality and cutting performance of the tool. [PERSON] [6] made use of a laser marking machine to produce different micro-textures on the rake face of cemented carbide tools.