Bennie Briscoe of Philadelphia wants to prove that at age 36 he is not too old for middleweight Nick Ortiz of Puerto Rico in a 10-round bout tonight at D.C. Armory/Starplex.

"Everybody is worried about my age," Briscoe, the veteran of 83 bouts, said yesterday.

"My whole career has been based on being in condition. Age doesn't matter; I don't feel 36.

"North Philadelphia boxers are all bad. My record speaks for itself." He has won 60 and lost 17 bouts, and gained draws against former champions Carlos Monzon and Emile Griffith.

Ortiz has won 25 of 30 bouts, mostly in Puerto Rico. He has promised to exert extra pressure on Briscoe because the Philadelphian scorned a handshake at the contract signing.

Ortiz said, through an interpreter, "Briscoe showed a lack of respect . . . bad upbringing from his parents and is sometwhat on the ignorant side.

"Because of this and his failure to learn, I'll have to teach him by some other means. I'll have to give him a boxing lesson. I had planned to go 10 rounds, to get the work, but now I'm goint go cut it short."

Among the other tigers who will be turned loose is Marian Trimiar, billed as the women's lightweight boxing champion.She prefers to be known as "Lady Tiger."

Trimiar, of Los Angeles, will oppose Toni Harris of Chicago in an eight-round bout.

Derrik Holmes, Washington's unbeaten featherweight with a 7-0 record, takes on Felix Rodriquez, a stablemate of Ortiz who has a 3-3 record, in a six-rounder.

The six-bout card begins at 8 p.m. and the main event is targeted for about 10:30.

Proceeds from this first promotion by James L. Denson, president of the D. C. Chamber of Commerce, will be used by Network Plus, a women's organization headed by Effi Barry, wife of the city's mayor, for athletic programs in District public schools.