how to switch salvage title to clear title?
No legal way to do it, especially in CA.
The "salvage" branding is to aid/warn future owners, to let them know that at some point the vehicle was damaged badly enough to be salvaged/totaled by an insurance company, or owned by a wrecking yard. Since you can't undo history, you can't undo the salvage title. This is a bit of a drag since undamaged cars get donated to salvage yards and the way Kelly Blue Book works sometimes "totals" older cars (with low values) with non-structural damage. But regardless, it stays on the title as a warning to future owners.
Now, what I want to know is why every person that wants to switch a salvage title also doesn't know how to use the "search" function...This topic shows up at least every couple of months.