INDIANAPOLIS (AP) _ Winning is becoming a habit to Bonnie Gadusek, who is ranked 11th in the world.

Second-seeded in the $75,000 Virginia Slims of Indianapolis women's tennis tournament, Gadusek captured her second title in two weeks Sunday when she breezed to victory against Pam Casale, the No. 3 seed.

Gadusek, a 22-year-old who lives in Largo, Fla., needed less than 45 minutes to defeat Casale 6-0, 6-3 on the indoor courts at the Indianapolis Racquet Club.

''I thought if I kept up he pressure and kept her moving, I would win the match,'' said Gadusek. ''I think I've played really well these last three matches.''

Gadusek, who picked up $12,000 for the victory, didn't drop a set in her march to the championship.

Casale, of Fairfield, N.J., was down 0-4 in the second set before she won her first game of the evening. She then broke Gadusek's serve and held her own to bring the score to 3-5. But Gadusek held her serve for the match.

Casale entered the final after a Saturday night win over top-seeded Kathy Rinaldi.

Referring to her title-match opponent, Casale said: ''Bonnie played awfully well. She came booming at me and she did everything right. She wouldn't let up from the beginning to end and she had very few unforced errors.''

In the doubles final, Gadusek and Mary Lou Piatek teamed up to defeat Sandy Collins and Penny Barg in a 39-minute match, 6-1, 6-0.