Chicks dig superheroes ... just ask the crime-fighting MMA fighter in Texas who's been hit with a tidal wave of marriage proposals ever since he beat up 3 gas station robbers earlier this month!

Houston's most eligible bachelor is Mayura Dissanayake -- who became an instant celebrity when he left his post as a clerk at Fuel Depot to rescue his co-worker, who was being jumped in the parking lot.

But Mayura wasn't just flooded with media requests -- he was also slammed with marriage proposals on social media from his new female fan base ... so says his MMA trainer Saul Soliz.

"You can't blame the ladies ... he's easy on the eyes."

tmz.com