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The shape memory effect in NiTi comes from the austenite/martensite phase transformation since martensite is a low temperature stable phase with the absence of stress whereas austenite is a high temperature stable phase .
 machanical property: shape memory effect; material: NiTi; material: austenite/martensite phase transformation; material: martensite; machanical property: temperature stable phase; machanical property: stress; material: austenite; machanical property: temperature stable phase
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 machanical property: shape memory effect; material: NiTi; material: austenite/martensite phase transformation; material: martensite; machanical property: temperature stable phase; machanical property: stress; material: austenite; machanical property: temperature stable phase