Precision Castparts plans to acquire Titanium Metals Corp. for $3 billion, funded almost entirely with debt, which will result in a significant deterioration in the firm's currently very strong credit protection measures. We are affirming our ratings on the aerospace supplier, including the 'A-' corporate credit rating and 'A-1' short-term rating. The stable outlook reflects our expectations that the strong commercial aerospace market and the company's solid history of integrating and improving acquisitions should result in credit ratios consistent with the rating over the next 12-18 months. NEW YORK (Standard&Poor's) Nov. 12, 2012--Standard&Poor's Ratings Services said today that it affirmed its ratings on Precision Castparts Corp., including the 'A-' long-term corporate credit rating and 'A-1' short-term