Global population growth and tremendous economic development has brought us to the crossroads of long-term sustainability and risk of irreversible changes in the ecosystem. Energy efficient and ecofriendly technologies and systems are critically needed for further growth and sustainable development. While ceramic matrix composites were originally developed to overcome problems associated with the brittle nature of monolithic ceramics, today the composites can be tailored for customized purposes and offer energy efficient and ecofriendly applications, including aerospace, ground transportation, and power generation systems. The 9th International Conference on High Temperature Ceramic Matrix Composites (HTCMC 9) was held in Toronto, Canada, June 26-30, 2016 to discuss challenges and opportunities in manufacturing, commercialization, and applications for these important material systems. The Global Forum on Advanced Materials and Technologies for Sustainable Development (GFMAT 2016) was held in conjunction with HTCMC 9 to address key issues, challenges, and opportunities in a variety of advanced materials and technologies that are critically needed for sustainable societal development. This Ceramic Transactions volume contains a collection of peer reviewed papers from the 16 below symposia that were submitted from these two conferences Design and Development of Advanced Ceramic Fibers, Interfaces, and Interphases in Composites- A Symposium in Honor of Professor Roger NaslainInnovative Design, Advanced Processing, and Manufacturing TechnologiesMaterials for Extreme Environments: Ultrahigh Temperature Ceramics (UHTCs) and Nano-laminated Ternary Carbides and Nitrides (MAX Phases)Polymer Derived Ceramics and CompositesAdvanced Thermal and Environmental Barrier Coatings: Processing, Properties, and ApplicationsThermomechanical Behavior and Performance of CompositesCeramic Integration and Additive Manufacturing TechnologiesComponent Testing and Evaluation of CompositesCMC Applications in Transportation and Industrial SystemsPowder Processing Innovation and Technologies for Advanced Materials and Sustainable DevelopmentNovel, Green, and Strategic Processing and Manufacturing TechnologiesCeramics for Sustainable Infrastructure: Geopolymers and Sustainable CompositesAdvanced Materials, Technologies, and Devices for Electro-optical and Medical ApplicationsPorous Ceramics for Advanced Applications Through Innovative ProcessingMultifunctional Coatings for Sustainable Energy and Environmental Applications