Which of the following describes titanium's physical characteristics?

Titanium is known for its remarkable blend of physical characteristics, which include being lightweight and exhibiting strength comparable to that of steel. This attribute makes titanium an excellent choice for applications where both durability and reduced weight are critical, such as in the aerospace and medical industries. The lightweight nature of titanium allows for ease of handling and creates less strain in structures, while its strength ensures that it can withstand considerable stress and pressure.

The other characteristics mentioned in the other choices do not accurately represent titanium. For instance, titanium is not inflexible or brittle; in fact, it is known for its ductility and toughness. Additionally, titanium is highly resistant to corrosion and is not heavy compared to steel, making it an ideal material for various uses. Therefore, the description stating that titanium is lightweight and strong as steel captures its key physical characteristics accurately.