Thomastik Vision Titanium Solo Violin Strings offer a synthetic core string that yields rich, complex tone. The strings settle in within 2-4 hours and deliver unparalleled tuning stability and exceptional playability. The E string is titanium wound. Thomastik Vision strings are designed for advanced violinists. Vision Titanium strings are especially for soloists. Vision Titanium Orchestra strings have lower tension, a richer and warmer sound, and a feel and tone quite similar to gut core strings..