All the titanium does is allow the designer to make a less bulky wetsuit that wont be affected as much by preasure while scuba diving. Compresion of a wetsuit realy screws with your boyancey under water.JacksonAUS said:I sort of learned about Titanium lined wetsuits in my design tech class at school this week. I think it has a thin lining of a titanium powder that doesn't allow your body heat to pass through it, it also reflects the cold.