Martinez, who helped Auburn win the 2005 SEC Championship, defeated Suh in 19 holes of match play at the Settindown Creek Course.
"I love match play," the AU golfer said. "It is a great kind of golf because you don't have to worry about making a six on a hole. It allows you to focus on the shot a little bit more so for me it's matter of getting that balance between being too aggressive and not aggressive enough."
Martinez will take on Alison Whitaker on Saturday while Angela Park takes on Morgan Pressel in the other semi-final.