Mayor Marion Barry said late yesterday that D.C. Boxing Commission Chairman Cora Wilds, under fire for allegedly double-billing thousands of dollars in travel expenses, has submitted her resignation.

Barry said in a telephone interview that he accepted Wilds' resignation after several conversations during the past two days. Barry acted amid growing pressure from the D.C. Council, which under city law has the power to remove boxing commission members.

"I have had several discussions . . . with Mrs. Wilds, particularly about the double billing," Barry said. "First, I expressed my grave concerns about it and secondly, she has offered to resign."

Barry said Wilds, 42, will submit a letter confirming her resignation, and it will take effect in a few days. He said that by law there must be two active members of the three-member commission and that he is trying to determine whether former police chief Burtell Jefferson wants to be reappointed.

The terms of Wilds and Jefferson expired in January but they have continued to serve pending reappointment. The third member of the commission is Lloyd Moore.

Barry's announcement came at the end of a day in which council member Frank Smith (D-Ward 1), whose Committee on Public Services held hearings last week on Wilds' travels, said he was considering invoking a little-known law that gives the council authority to remove boxing commission members for good cause.

Also yesterday, D.C. Council Chairman David A. Clarke called for more hearings by Smith's committee. Clarke had suggested earlier in the day that Wilds step aside temporarily if news media accounts of her travel expenses proved correct.

The Washington Post reported on Wednesday that Wilds had charged the city for about $3,000 in travel expenses for trips in 1983 and 1985 at the same time that an international boxing organization had paid the expenses. Wilds returned $2,745 by overnight express to the joint International Boxing Federation-United States Boxing Association on Tuesday, according to a boxing federation official who said Wilds included a note saying the money was to repay the IBF-USBA for travel reimbursments.

Smith, who conferred with council lawyers yesterday, said last night that he would have introduced a resolution on Monday calling for Wilds' dismissal.

"If she has resigned, I think that is the best," Smith said. He said he still wants to look into commission records and find out how the decisions to take trips were made.

The boxing commission regulates professional and amateur boxing in Washington, including Barry's annual tournament, which this year drew amateurs from 16 cities.

"{Wilds} has done a lot for amateur boxing," Barry said yesterday. "I asked about her motivation {for so many trips}. She said, 'Mr. Mayor, I felt an obligation to represent the District of Columbia. Often times I was the only black person on {boxing} boards and commissions. Most of the boxers are blacks, those who control it are not.' "

Barry added, "I happen to agree with her."

The mayor noted that Wilds had been confirmed twice by the council and that audits of the commission by D.C. Auditor Otis H. Troupe dating to 1983 had not shown any improprieties.

Barry repeated a pledge that "we should protect and account for every penny of public money. {Anyone who} works in the government . . . ought to be cognizant of that. To go against it goes against my value system."

Wilds could not be reached for comment. Efforts to reach her at her home and offices this week have been unsuccessful. The Department of Consumer and Regulatory Affairs, which oversees the three-member boxing commission, was referring calls about the commission yesterday to the office of D.C. Inspector General Vernon S. Gill, who began an investigation this week of Wilds' spending.