Bloomberg reports that Dow Chemical Co., the largest U.S. chemicals manufacturer, and Aksa Akrilik Kimya Sanayii AS, a Turkish maker of synthetic acrylic fibers, are in talks to form a joint venture to make carbon fiber and derivatives. Dow and Istanbul-based Aksa signed an accord to examine opportunities to develop and market a broad range of products and technical service offerings in the carbon fiber-based composites industry. Aksa planned to double its annual carbon fiber production to 3,000 tons in 2010. That compares with total global carbon fiber production capacity of 30,000 tons a year, he said. The fibers are used in ships, planes, wind turbines, sports equipment and other products.