SpaceX announced that the plan for the currently aluminum-with-thermal-paint grid fins was to make them out of titanium. https://www.nasaspaceflight.com/2017/0

SpaceX announced that the plan for the currently aluminum-with-thermal-paint grid fins was to make them out of titanium. https://www.nasaspaceflight.com/2017/03/spacex-new-spaceflight-successful-core-reuse/ https://www.nasaspaceflight.com/2017/03/spacex-new-spaceflig...