Metal Matrix Composite (MMC) materials offer tremendous potential for lightweight propellant and pressurant tankage for space applications. Thin MMC liners for COPVs would have enough strength to withstand tensile loading at maximum expected operating pressure (MEOP) and compressive loading at zero pressure without buckling. Thus, performance benefits would be expected when compared to aluminum, titanium, and stainless steel liners. Touchstone proposes to team with Carleton Technologies Pressure Vessel Division (part of the Cobham Life Support Division, Westminster, MD) to extend current MMC technology into the area of lightweight, multifunctional pressure vessels that can minimize propulsion system mass growth and achieve the efficiencies that will make future propulsion systems viable. The development of improved cryotanks can easily be extended to programs within the Departments of Defense and to private industry. The successful completion of the proposed work will expedite the implementation of this enabling technology into aerospace, military, and commercial applications.