A man check his phone near an Apple logo outside its store in Shanghai, China September 13, 2023. REUTERS/Aly Song Acquire Licensing Rights LONDON, Sept 13 (Reuters) - Apple (AAPL.O) launched a new series of iPhones this week that included a titanium shell, which will make the handsets the lightest the company has ever made and the case more durable. Titanium is increasingly being used in mobile phones. China's titanium producers said they expect stronger demand after the launch of the new Apple models. Here are some key facts on titanium: WHERE IS TITANIUM PRODUCED? Titanium minerals are used to...