天原股份：公司氯化法钛白粉主要供应涂料、塑料、造纸等下游客户，PVC改性材料主要用于电缆、电器等领域

Group 1 - The company primarily supplies chlorinated titanium dioxide to downstream customers in coatings, plastics, and paper industries [1] - The company has confirmed that it does not produce PEEK materials [1] - The company has achieved over 50% market share in the domestic PVC-O market for pipe diameters over 800mm and is the only company in China to master both one-step and two-step methods for PVC-O production [3] Group 2 - The company is the second globally and the first in China to achieve mass production of PVC-O fittings with diameters reaching 1000mm [3] - The company has received certification for aviation-grade chlorinated titanium dioxide from aviation coating manufacturers, ensuring stable supply [3] - High-performance PVC modified materials are used for ground equipment and have industrial-grade certification [3]