A salvage titles means that the car was totaled by the insurance company but it doesn't always mean that the car is unsafe.
Sometimes Auto Insurance companies will total the car because it's just not worth the cost of fixing. But some people buy totaled cars and then repair them and sell them with a salvaged title and they'e perfectly okay to drive and nothing hard about getting it registered.
You might need an inspection of the car prior to registering it and titling it in your name depending on the State you're registering the vehicle in but there's not difference in getting a salvaged title vehicle registered and a non salvaged vehicle registered.