The most commonly used materials for injection molds are high-quality cold work die steel, hot work die steel, and alloy tool steel. These materials have high hardness, good machinability, and are wear-resistant and impact-resistant, making them great for mass production.

Compared to steel, aluminum alloy injection molds are less expensive, lighter, and have good thermal conductivity. They are good for low volume production, rapid mold development, and prototyping. However, aluminum alloys have relatively low hardness and are easily damaged.

Copper has a longer service life than steel, better corrosion resistance, and is suitable for processing products with high precision requirements.

Titanium alloy has extremely high strength, hardness, and wear resistance. It also has good corrosion resistance and thermal conductivity. It delivers considerable value in manufacturing high-precision, large-scale products.

Ceramic injection molds have extremely high hardness, high temperature resistance, deformation resistance, corrosion resistance, and a long service life. They are great for manufacturing products that withstand high temperatures and ultra-high pressures.

In real applications, the choosing of injection mold materials should be based on the specific manufacturing environment and workpiece requirements. Besides, factors such as product size, material and precision requirements, quantity and production cycle, mold cost and production efficiency, and temperature and pressure in the production environment must also be considered.