I'm not sure if by 'silver soldering' you mean actually using low temp silver solder or brazing with a silver bearing alloy. These are commonly and incorrectly interchanged.
I spent several years working in the custom bicycle business where the use of titanium and torch brazing are commonplace (but not at the same time). As of a few years ago no one in that industry was brazing or soldering Ti though. Apparently there are special fluxes and filler metals (most are silver bearing) which would allow torch brazing of Ti but I've never seen it done. The difficulty arises due to the oxide layer which forms very quickly even at room temperature.
It is frequently furnace brazed under inert gas or vacuum conditions for aerospace and other applications though.