It was a topsy-turvy match during which seven breaks of serve were exchanged. Sramkova broke five times in total compared to her opponent’s two.
Bronzetti will be left to rue not making more of this opportunity in what has been a wide open field in Tunisia.
Sramkova, ranked No 136, will play the winner of the match between German Eva Lys and qualifier Sonay Kartal next.
Ahead of her victory, the Slovak defeated French qualifier Elsa Jacquemot (2-6, 7-5, 6-3), Frenchwoman Clara Burel, the second seed (7-6 (4), 7-5) and Spaniard Sara Sorribes Tormo (1-6, 7-6 (5), 7-5).
Bronzetti, ranked No 86, beat Hungarian Dalma Galfi (6-2, 6-1), American Ann Li (6-4, 7-6 (3)) and Croat qualifier Antonia Ruzic (6-2, 6-1) earlier in the tournament.
Monastir WTA 250, other semi-final result (Skanes Family Hotel Monastir, hard, USD 267.082):