People who think they know a lot about bikes like to spread that whole salvage title bullshit when in reality a clean title is just as likely to be f***ed up.
Take Onefast's Fireblade for example, It has a clean title and the frame is split in two where the pin that holds the swingarm on goes through.
I suppose a salvage title is more likely to be damaged but all you have to do is look at the main stuctural points of the frame to know if it's fucked or not, Everything else is repairable as long as the engine is okay and that's obvious.