How to remove selected value when click button of Autocomplete Material UI?

I’m using autocomplete of material-ui, and trying to delete selected value whenever click a button but can not find any way to do that. Any idea? <Autocomplete className={classes.techListBox} disableCloseOnSelect={true} multiple options={this.props.displayProject.techList} getOptionLabel={options => options.title} defaultValue={this.props.displayProject.techName} onChange={(e, techs) => { this.formatTechID(techs); }} renderInput={params => ( <TextField {…params} variant=”outlined” placeholder={t(“tech”)} margin=”normal” fullWidth /> )} ></Autocomplete>“`