Jim Cangiano of Dickerson walked the Congressional Country Club course patiently yesterday, trying to free his mind of the pressure that had built up as he and Bethesda's Trevor Randolph entered the final two holes of the Washington Metropolitan Junior Open golf tournament tied for the lead.

But Cangiano bogeyed the 17th hole, and the All-Met from Poolesville High School could only hope the championship had not slipped away. Instead, Randolph, who could have moved in front by sinking a 15-foot putt, wound up with a double bogey and fell behind.

That turnabout was all that was needed by Cangiano, winner of last month's Bobby Bowers Junior at Springfield. He safely teed off over the lake and three tiers of green before sinking a two-foot putt for par, a 76 and victory in the 16-17 age group with a 54-hole score of 222.

"The pressure was building up, but the pressure is always there in the major tournaments," said Cangiano, who never had played Congressional until the tournament began Monday. "When you are leading, you just have to deal with it and I feel like I played real well for my first time playing on this course."

Randolph, who entered the last round trailing by one, also double-bogeyed the final hole to finish three strokes behind at 225. Vienna's Mark McGuire overcame a triple bogey on the second hole to place third with a 78 for 238.

"Nothing went right," said Randolph. "I should have won, but I did not play very well on the back nine. The back nine is much easier, but the double bogey on 17 just killed me. I had played it even the last two days and I only shot 43 today."

In the 14-15 group, Bobby Bilbo of Olney continued his dominant performance with a 76 for 231. William Gwinn of Alexandria, six strokes back entering the final round, had 77 for 238 and second place.

WDGA Championship: Defending champion Shawn McCullough of Woodlawn won her second match by defeating Cindy Carlin of Montgomery Village, 5 and 4, in the championship flight of the women's meet at Norbeck Country Club in Rockville. She meets Carol Davies Lillie of Argyle in the semifinals today. Lillie beat Carol Mills of Army Navy, 3 and 2.

Monday's low scorers, Cami Berher of Montgomery Village and Sharon Briggs of Montgomery Village, will square off in the other semifinal. Berher defeated Sheila Dagucon of Montgomery CC, 3 and 2, and Briggs downed Lynda Bindseil of Montgomery Village, 5 and 3.

In the first flight, Diana Saine of Springfield, Joan Craver of Montgomery, Wendy Stewart of Belle Haven and Malsum Lee of Indian Spring advanced to the semifinals.

Virginia Senior Amateur: Past winners Arman Fletcher of Roanoke and Blair Nicely of Lexington posted 1-under-par 71s in the first round of qualifying for the annual championship in Hot Springs.

Following today's second round of qualifying, the low 15 scorers will join defending champion Henry Kerfoot of McLean in matches Friday.