Composites with carbon fiber or titanium may produce lighter instruments with high strength. Research into shape-memory alloys could lead to self-tuning valves that automatically adjust to temperature changes. Ceramic coatings on slides could offer friction-free operation, eliminating the need for grease. While brass remains the tonal touchstone for most musicians, alternative materials could broaden the sound palette and reduce physical strain on players—especially important for larger tubas and euphoniums. Some experimental instruments already use aluminum for the main body to reduce weight, with a brass bell for tone.