 PITTSBURGH--BUSINESS WIRE--Howmet Aerospace Inc. Howmet Aerospace or the Company NYSE:HWM today announced a number of capital allocation actions. The Board of Directors of Howmet Aerospace authorized an additional share repurchase program for up to 1.5 billion of its outstanding common stock. After giving effect to the additional authorization, the Company has a total of up to 1.577 billion repurchase authorization available. Howmet Aerospace also today announced the launch of a pro 