Titanium, stainless steel, brass, copper, and bronze all make durable pen bodies, but they create noticeably different carry experiences. Weight, surface change, temperature, and maintenance matter more in daily use than a specification sheet may suggest.
Titanium: light and resilient
Titanium offers an excellent strength-to-weight balance and resists corrosion from ordinary pocket use. It tends to feel lighter than its size suggests and works well for people who carry a pen all day or write for longer periods.
Stainless steel: solid and balanced
Stainless steel adds density. Some writers prefer that weight because the pen settles into the hand with less pressure. Its clean industrial finish also fits a desk environment while remaining durable enough for EDC.
Brass, copper, and bronze: changing surfaces
These warm metals react to handling and the environment, gradually developing patina. That change is part of their appeal. They are usually heavier than titanium and may require occasional cleaning if you prefer a brighter finish.
Let use decide
Choose titanium for lower carry weight, stainless steel for a more substantial feel, and brass, copper, or bronze when visible aging is part of what you enjoy. There is no universally superior material; there is only the material that supports your routine.