Temperature-sensitive materials are substances that change their properties in response to temperature variations. These materials can expand, contract, or alter their electrical or optical characteristics when exposed to different temperatures. Common examples include thermochromic materials, which change color with temperature, and shape memory alloys, which can return to a predetermined shape when heated. These materials have various applications in industries such as electronics, textiles, and healthcare. For instance, temperature-sensitive inks are used in packaging to indicate freshness, while smart textiles can adjust their insulation properties based on body heat. Their unique responses to temperature make them valuable in innovative technologies.