There is a genius idea that titanium alloy is used as the blade, steel is used as the blade, and some copper is added to the inside of the knife. What will it look like if it is really built?

Your idea just reverses the advantages of steel and TC 18 titanium alloy. Steel is characterized by ultra-high hardness, medium-high strength and heavy weight. Suitable for blades, TC 18 titanium alloy has ultra-high strength, ultra-high toughness, medium-high hardness and light weight, and is suitable for blade body. As for the two, it depends on the craftsman's mastery and control of temperature, heat treatment and quenching whether the knife can be made by J-clip steel punching method in Shancheng (that is, the groove of titanium alloy knife is inlaid with steel blades). This manual work is extremely difficult. Furnace temperature experience and quenching experience are all experiments of professional old knives thousands of times before they can be played out. In ancient times, this was the probability of Mo Xie's life.