A comany called Triad in Chartley, Massachusetts makes the device
that you need. It is called a fusion welder, and will fuse posts onto
titanium. There are 2 models- Sparkie 1 and Sparkie 2. Either will
fuse pusts- the larger unit has more power and can also fuse a wide
variety of findings such as omega backs, pin backs, and joints, etc.
The findins are available in sterling, gold alloys, platinum and