A process for bonding composite materials within a high-pressure isostatic reactor by applying variable profiles of temperature and pressure to said composite materials comprising the following steps: a) precutting two or more constituent materials, wherein one or more constituent material may be a flexible constituent material and one or more constituent material may be a rigid constituent material; b) stacking said constituent materials in patterns of layering and orientation required to achieve the desired properties of a consequent composite end product to be fused along with a suitable bonding material such that the constituent materials form a composite stock; c) applying one or more additives to the composite stock; d) sealing the composite stock within a composite pouch; e) placing the composite pouch in an isostatic high pressure chamber; f) distributing pressure and temperature uniformly over the surface of the composite pouch for the fusing of the constituent materials by using a mixture of hydraulic fluids and heat transfer oils; g) providing a means for moulding the flexible constituent material to the contours and shape of the rigid constituent material by applying of variable profiles of temperature and pressure for predefined intervals of time in the high pressure chamber for a predefined period of time; h) increasing and then maintaining the pressure and temperature of the composite stock within the composite pouch for a pre-defined period of time to a level required to achieve optimum bonding of the composite stock and uniform temperature throughout all surfaces of the constituent materials within the composite stock; i) reducing the temperature of the composite stock while maintaining pressure at the levels specified in step (f) in order to ensure optimum bonding of the constituent materials within the composite stock and the formation of the bonded composite material; j) removing the composite pouch from the isostatic high pressure chamber and cleaning said composite pouch; k) retaining the composite pouch such that the composite pouch becomes an integral part of the bonded composite material. a) precutting two or more constituent materials, wherein one or more constituent material may be a flexible constituent material and one or more constituent material may be a rigid constituent material; b) stacking said constituent materials in patterns of layering and orientation required to achieve the desired properties of a consequent composite end product to be fused along with a suitable bonding material such that the constituent materials form a composite stock; c) applying one or more additives to the composite stock; d) sealing the composite stock within a composite pouch; e) placing the composite pouch in an isostatic high pressure chamber; f) distributing pressure and temperature uniformly over the surface of the composite pouch for the fusing of the constituent materials by using a mixture of hydraulic fluids and heat transfer oils; g) providing a means for moulding the flexible constituent material to the contours and shape of the rigid constituent material by applying of variable profiles of temperature and pressure for predefined intervals of time in the high pressure chamber for a predefined period of time; h) increasing and then maintaining the pressure and temperature of the composite stock within the composite pouch for a pre-defined period of time to a level required to achieve optimum bonding of the composite stock and uniform temperature throughout all surfaces of the constituent materials within the composite stock; i) reducing the temperature of the composite stock while maintaining pressure at the levels specified in step (f) in order to ensure optimum bonding of the constituent materials within the composite stock and the formation of the bonded composite material; j) removing the composite pouch from the isostatic high pressure chamber and cleaning said composite pouch; k) retaining the composite pouch such that the composite pouch becomes an integral part of the bonded composite material.