The top-seeded 33-year-old from Sao Paulo fought off opposition from his own country, Paraguay and Mexico to reach his third Tour final of the year and the 22nd of his career.
Waiting for the world No39 was North American rival Christopher Gordon, the second seed from
New York who had also despatched his semi-final opponent in straight games.
After a close first game which went to a tie-break, Alarcon exerted his authority on the final to beat Gordon, ranked 43 places lower, 12-10, 11-8, 11-6 in 54 minutes.
The triumph notches up Alarcon's 15th PSA Tour title - exactly seven years after winning his first on home soil in Campinas.
Semi-finals:
[1] Rafael F Alarcon (BRA) bt [8] Erik Tepos Valtierra (MEX) 11-5, 11-3, 11-7
[2] Christopher Gordon (USA) bt [5] Dick Lau (HKG) 11-4, 11-8, 11-4
Quarter-finals:
[1] Rafael F Alarcon (BRA) bt [6] Esteban Casarino (PAR) 11-13, 11-4, 11-5, 11-7
[8] Erik Tepos Valtierra (MEX) bt [4] Bradley Hindle (MLT) 7-11, 7-11, 11-4, 11-6, 11-8
[5] Dick Lau (HKG) bt Manoel Pereira (BRA) 11-8, 11-8, 11-2
[2] Christopher Gordon (USA) bt [7] Lewis Walters (ENG) 11-4, 11-6, 7-4 ret.
1st round:
[1] Rafael F Alarcon (BRA) bt [Q] Jose Pl de Escobar (BRA) 11-4, 11-6, 11-3
[6] Esteban Casarino (PAR) bt Nahuel Hernan Ramos (ARG) 11-3, 11-5, 11-7
[4] Bradley Hindle (MLT) bt Vinicius Rodrigues (BRA) 12-1, 5-11, 12-10, 11-9
[8] Erik Tepos Valtierra (MEX) bt [Q] Rodrigo Silvestre (BRA) 11-5, 4-11, 11-7, 11-3
[5] Dick Lau (HKG) bt [Q] Rodrigo Torres (COL) 11-9, 11-6, 11-8
Manoel Pereira (BRA) bt [3] Karim AGA Samy (EGY) 11-8, 11-8, 9-11, 11-9
[7] Lewis Walters (ENG) bt [Q] Diego Bolzan (BRA) 11-4, 11-8, 11-6
[2] Christopher Gordon (USA) bt Luke Forster (AUS) 9-11, 11-1, 11-9, 11-9
Issued by iSPORTgroup.com