Tele-Communications disclosed that it increased its stake in United Artists Communications to 64.4%, from 55% . . . Owens-Illinois said it will place on hold the restructuring plan it announced Monday while it considers a $3.6-billion takeover offer by Kohlberg Kravis Roberts & Co. . . . International Technology Corp. said it has completed the acquisition of Pei Associates of Cincinnati, for undisclosed terms . . . Wherehouse Entertainment of Torrance announced that it has increased the authorization to repurchase shares of its common stock to 900,000 shares from 250,000 . . . National Semiconductor said it expects to incur a one-time charge of about $15 million in its third fiscal quarter, ending March 8 . . . Bethlehem Steel Corp. said it expects to report a profit for the fourth quarter of 1986, its first profitable quarter since the spring of 1985. The firm has reported losses in 17 of the past 19 quarters . . . The Commerce Department reported that U.S. housing completions rose 0.9% in November from the month before when they fell 0.6% . . . In Little Rock, Ark., Pulaski County Circuit Judge Perry Whitmore has reaffirmed his decision to allow Metropolitan Life Insurance Co. to assume life insurance policies issued by units of the bankrupt Baldwin-United Corp.