This report details the results of RMI’s 2012 Autocomposites Workshop. During the course of a three-day workshop, ~40 leading experts from across the automotive carbon fiber composite value chain, industry experts, and government representatives convened to develop approaches to break down the barriers that have stifled advancements in vehicle weight reduction made possible by widespread penetration of carbon fiber composite into mainstream vehicles. This report summarizes the key findings from the workshop.