Which statement about the ductile-to-brittle transition temperature is true?

The ductile-to-brittle transition temperature is a crucial concept in materials science, particularly concerning the behavior of materials under varying temperatures, especially for structural integrity in engineering applications. The accurate characterization of this transition temperature is particularly significant for structures exposed to cold environments.

In low-temperature conditions, many materials that are normally ductile may become brittle and fail unexpectedly. Understanding the ductile-to-brittle transition temperature allows engineers to make informed decisions about material selection and design for safety and reliability. Structures susceptible to lower temperatures require careful consideration of this transition to avoid catastrophic failures.

This understanding directly supports the assertion that the transition temperature is important for structures in cold environments, ensuring that materials are chosen that retain ductility and toughness at operational temperatures.

While the other options mention specific characteristics related to failure modes and energy absorbed during fracture, they do not directly apply to the broader implications of the ductile-to-brittle transition temperature in everyday engineering practices, particularly regarding material performance in varying environmental conditions.