In this research, three-layer composite of brass-IF-brass was fabricated by cold roll bonding process (CRB) and the effect of CRB process parameters on bond strength, mechanical properties and formability of composite were investigated. Firstly, the influence of process parameters such as thickness reduction and pre-rolling annealing, Surface roughness and heat treatment after rolling on bond strength between layers and mechanical properties of composite was evaluated. Bonding quality was assessed by peeling test. Then fracture surface of samples obtained from peeling test rated by optical and scanning electron microscopes. Mechanical properties of composite were reckoned by hardness, micro-hardness, tensile, three point bending and punching shear tests. To estimate fracture mechanism and microstructure of samples, optical and scanning electron microscope were applied. Formability of composite were investigated at 5 optimal annealing temperatures, anisotropic and Erichsen tests were performed to assess formability of composite . The results showed that growing thickness reduction and surface roughness gave rise to an increase in bond strength. Regarding to maps of fracture surfaces obtained from elemental analysis, it was figured out that increasing the brass surface roughness compared to IF steel had more influence on the bond strength of the composite due to its vital role on bonding formation in cold rolling processing. Pre and post rolling annealing caused to raise bond strength. Due to atomic diffusion phenomenon and formation of no intermetallic particles, post rolling annealing treatment had more influence on bond strength of composite. Furthermore, increasing plastic deformation led to enhance strength and hardness of composite. Due to high energy stored in composite at thickness reduction of 80 %, dynamic recovery and dynamic recrystallization phenomena took place in layers of IF steel and brass, respectively, which led to slightly reduce hardness and strength in whole composite. An increase in surface roughness gave rise to thrive shear strength of composite. Upon scratch brushing with fixed brush, the surface of IF steel work hardened much more than brass which assigned to abrasive wear mechanism. Subsequently, an increase in surface roughness of IF steel caused to grow shear strength. Unlike case without annealing treatment, pre-annealing resulted in decreasing hardness and strength of composite. Temperature and time rise of annealing gave rise to lessen hardness, strength and increase ductility. Recrystallization phenomenon in composite completely occurred at 700°? for 10 min. Formability of composite was valuated at 500°? through 700 °? for 10 min. the results illustrated that temperature rise of annealing led to raise dome height created by Erichsen test. Additionally, a rise in annealing temperature, the normal anisotropy raised and planar anisotropy declined which caused to enlarge deep draw ability in composite. Keywords: Layered composite, Cold Roll bonding (CRB), Bond strength, mechanical properties, Formability .