1. Carbon Content:
• 316: 316 stainless steel is a low-carbon type and typically contains a maximum of 0.08% carbon. This low carbon content helps the steel maintain its stainless properties and provides high resistance against corrosion.
• 316Ti: 316Ti (Ti symbolizes titanium) is an alloyed type of steel with titanium. The addition of titanium prevents the carbon in the steel from forming carbides. This allows the steel to be used at high temperatures and offers increased corrosion resistance due to the addition of carbon.

2. Usage Areas:
• 316: 316 stainless steel is commonly used in industrial, chemical, and marine applications. It is also widely used in food processing equipment and medical devices.
• 316Ti: 316Ti is more suitable for high-temperature applications. Therefore, it is preferred in equipment operating at high temperatures, heat exchangers, and some chemical processing applications. 

In summary, 316Ti is a stainless steel type with high-temperature resistance due to the addition of titanium, while 316 is suitable for a wider range of applications and is a commonly used stainless steel type. The choice between the two depends on the specific requirements of a given application.