Silver is generally softer than titanium steel. Titanium steel, which is an alloy of titanium and steel, possesses a higher hardness due to the addition of steel, which enhances its strength and durability. According to the Rockwell hardness scale, titanium steel typically ranges from 35 to 50 HRC, while pure silver is around 70 to 85 HB. This indicates that titanium steel is harder than silver.

The hardness of a material is determined by its ability to resist indentation or scratching. Titanium steel's hardness is a result of the alloying process, which involves combining titanium with steel to create a material that is stronger and more resistant to wear. The addition of steel to titanium increases the material's yield strength and tensile strength, making it harder and more suitable for applications requiring high strength and durability.

For instance, in the aerospace industry, titanium steel is preferred for its exceptional strength-to-weight ratio, which is crucial for aircraft components. The hardness of titanium steel allows it to withstand the extreme conditions of high-speed flight and heavy loads. In contrast, silver is often used in jewelry and decorative applications due to its aesthetic appeal and conductivity, but it lacks the strength and durability required for structural applications.

In summary, titanium steel is harder than silver, making it more suitable for applications that demand high strength and resistance to wear. The alloying process that creates titanium steel enhances its hardness, while silver's inherent properties make it more suitable for decorative and conductive applications.