Wouldn’t really work too well with the type of springs we use.
Beryllium copper C17530 has about the same yield strength and resistance to plastic deformation as titanium.
I looked at them when researching copper alloys for my BLF springs.
They had very similar mechanical properties.
However, the conductivity of titanium copper alloys tops out at 20% IACS, while BeCu C17530 is at 37,5%.
Basically, it was a no brainer to use BeCu C17530 over TiCu C1990 and other alloys.
However, it could be used still for lower performance spring if it is not needed.