Surbiton overcame a spirited Phyllis Court team, with one leg undecided.
For the third consecutive season, Surbiton will meet Ashby in the final, which will take place on Saturday 18 September at Wrest Park.
Results (Surbiton names first)
Howard Cheyne beat Charles Von Schmieder 2-0
Donald Beck beat Terje Johansen 2-0
Dick Knapp beat Raymond Wood 2-0
Mary Knapp lost to Christopher Roberts 0-2
Mary Knapp beat Raymond Wood 2-0
Dick Knapp v Christopher Roberts 1-1 (not completed)