Here is a brief technical explanation. Proper grading procedures are necessary for titanium gold plating. Whether titanium or pure gold, the hardness grade of the metal needs to be specified. If no harness grade for gold coating is determined, for instance, a type I will be applied at what is defined as the hardness Grade A. Type II grading applies to a hardness Grade C. For the purposes of soldering, it is necessary for a thin high purity soft gold coating to be achieved.
The minimum thickness required is so minute that you would have to add at least four zeros before you arrive at the first numeral, namely number one. Work is scientifically driven but skilled technicians have to be dedicated to process oriented work. The processing work is refined further until such time that process control is achieved. Intricacy is required to tightly control a plating process. But results are achieved because the systems in place are dynamic.
Operating tools include plating tanks, rinse tanks and preparation tanks. They all have a number of variables which must be configured to maintain defined upper and lower control limits. Skilled technicians in the titanium and gold plating industry must always have a willingness to solve problems. For instance, cross contamination is possible. This happens when an entrapped solution in the geometry of a part being maneuvered moves down the plating line.
Chemistry changes can also occur in a plating bath while parts being plated deplete various bath constituents. The overriding solution has been to operate from a laboratory that is fully equipped with up to date analytical instruments. So far, so complex. But an understanding and appreciation of what goes into the metal plating processes is now possible.