The 34-year-old was driving a Fiat Seicento which collided with a Land Rover Defender which was turning right at the junction to Appletreehall, north of Hawick, at about 11:45 on Saturday.
The 86-year-old driver of the Land Rover suffered minor injuries.
Police officers investigating the crash have appealed for information from anyone who witnessed it.
Sgt Andy Gibb said: "Our inquiries into this collision are at an early stage and we would welcome information from any members of the public who witnessed this collision or who saw either the silver Fiat Seicento or the Land Rover Defender before the collision happened at 11.45 am."
A driver has been seriously injured in a crash involving two vehicles on the A7 road in the Borders.