Because Grade 2 titanium is 99% pure, it is more corrosion resistant than Grades 5 and 9 but not as strong. It has good formability and weldability. Common uses include chemical-processing equipment, heat exchangers, and marine hardware.

With a higher iron and oxygen content, Grade 4 titanium is the strongest of the commercially pure titanium alloys, Grades 1 through 4. Although not as strong as Grade 5 titanium, Grade 4 is more corrosion resistant, so it stands up to hydrochloric and sulfuric acids, sodium-hydroxide and ammonia alkalis, and chlorides. Use it in areas where strength and corrosion resistance are a must, such as in chemical processing and marine environments.

Grade 4 titanium has good formability and ductility, however it is not as good as Grades 1 through 3. It also has a good strength-to-weight ratio and can withstand impacts at low temperatures.