What pretreatment method do I need to ensure proper bonding of dissimilar metals?

Adhesive formulations are available for bonding almost any combination of dissimilar metal surfaces. Special attention must be paid to removal of contaminants such as dirt, oils, greases and extraneous particulates prior to bonding is essential to obtain durable high strength bonding. Mechanical roughening (abrasion) of the surfaces to be bonded is a simple, highly effective pretreatment, even for such difficult to bond metal surfaces as stainless steel or titanium.